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Data Acquisition
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Ford Mustang
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XTM Carbon on Carbon Clutches
For high powered road race cars, drifting or drag race vehicles that still use the synchromesh transmission, there is nothing equal to a true carbon on carbon clutch. When designed properly and using the right materials, carbon on carbon clutches offer many unique benefits not achievable with conventional materials. Carbon materials have been used for years in F1 and other top forms of racing as a friction material for both clutches and brakes with outstanding results. |
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Pressure Plate
When your engine puts out performance, you need a pressure plate that can handle it properly. All ACT pressure plates provide a generous increase in clamp load which directly increases torque capacity. ACT pressure plates are offered in... |
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Heavy Duty - HD
20 - 50% clamp load increased
Stock to moderate pedal feel
Best disc to use: Street or Race disc
Most certified to meet SFI Spec 1.1
Xtreme - XT
50 - 120% clamp load increased
Moderate to stiff pedal feel
Best disc to use: Street or Race disc
All certified to meet SFI Spec 1.1
MaXX Xtreme - XX
70 - 150% clamp load increased
Stiff to very stiff pedal feel
Best disc to use: Race disc
All certified to meet SFI Spec 1.1 |
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ACT heat-treats their diaphragms using an exclusive 3-stage process. ACT also hardens the release bearing contact area to reduce wear. Each pressure plate is designed in the optimum working range for maximum clutch life, clamp load, and release travel. Every pressure plate is tested to insure proper clamp load every time. |
This graph shows the ACT pressure plates will provide a higher clamp load for a longer distance than typical pressure plates. This exclusive ACT design translates into longer clutch life, a more positive feel and better shifting. There will be an increase in pedal effort ranging from slight to heavy depending on application. |
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Street Discs - SFI Certified to Insure Safety (most discs)
ACT Performance Street Discs are designed for smooth engagement, quiet operation and improved durability using only the best organic linings and spring center designs. ACT street discs are available in three designs; stock, modified, and performance. |
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Stock - 00
Quality Replacement Disc
Recommended for Street
Smooth engagement
Very quiet operation
Good burst and hub strength
Modified - MM
Recommended for Street or occasional Race
Quicker Shifting and Engagement
Quiet Operation
Increased Strength and Reliability
Better Friction Material for Heat Tolerance
Performance - SS
Recommended for Street and Race
High Copper Content Friction Lining for Heat Tolerance
Higher Burst Strength Due to Steel Backed Linings
Quicker Shifting and Engagement
Quiet operation
Best organic friction material, improved hub and burst strength |
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Race Discs - SFI to insure safety
Quicker shifting due to reduced weight
Higher torque and heat capacity than organic discs with fade free characteristics
Longer clutch life through ACT's careful selection of materials and features |
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Spring Centered - G4 & G6
G4 Four Pad for the Quickest Shifting, Recommend for Road Racing
G6 Six Pad for Better Heat Capacity and Better Engagement, Recommended for Road Racing and high power Street
Reduced driveline Shock and Spline Life Through the use of Torsional Dampeners
Quiet Operation by Reducing Torsional Vibrations
Harsh engagement, chatter
Solid Centered - R4 & R6
R4 & R6 Recommended for Drag and Road racing
Choose Four Pad for the Quickest Shifting
Choose Six Pad for Better Heat Capacity and Better Engagement
Improved Durability Because of Stronger Hub Components
Very harsh engagement, chatter |
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| ACT - Mustang |
Years |
Pressure
Plate |
Disc |
Torque
Capacity
f./lbs. |
Clamp
Load
increase |
SFI |
P/N |
Price |
Mustang
10.5" |
86-92 - 5.0L
93-95 - 5.0L GT & Cobra |
Heavy Duty
Heavy Duty
Heavy Duty
Xtreme
Xtreme
Xtreme |
Performance
Spring Centered 6 Pad
Solid Centered 6 Pad
Performance
Spring Centered 6 Pad
Solid Centered 6 Pad |
557
619
713
629
733
805 |
44%
44%
44%
62%
68%
62% |
Yes
Yes
Yes
Yes
Yes
Yes
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FM1-HDSS
FM1-HDG6
FM1-HDR6
FM1-XTSS
FM1-XTG6
FM1-XTR6 |
$415
$410
$369
$504
$499
$458 |
Mustang
10.5"
Aftermarket 26 spline |
86-92 - 5.0L
93-95 - 5.0L GT & Cobra |
Heavy Duty
Heavy Duty
Heavy Duty
Xtreme
Xtreme
Xtreme |
Performance
Spring Centered 6 Pad
Solid Centered 6 Pad
Performance
Spring Centered 6 Pad
Solid Centered 6 Pad |
557
619
713
629
733
805 |
44%
44%
44%
62%
68%
62% |
Yes
Yes
Yes
Yes
Yes
Yes
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FM4-HDSS
FM4-HDG6
FM4-HDR6
FM4-XTSS
FM4-XTG6
FM4-XTR6 |
$410
$405
$365
$499
$494
$454 |

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Flywheels
ACT XACT flywheels provide significantly improved engine response, acceleration and a higher degree of safety than the heavy stock flywheel. Most are available in two versions, Prolite and Streetlite. Many competitors flywheels are too light, fragile and expensive.
Prolite Flywheel
Lightest XACT Flywheel
Best throttle response, lowest inertia
Super Rigid, Precision Made, and Dynamically Balanced
Recommended for Road and Rally Racing |
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| ACT - Mustang |
Years |
# / Bolts |
Prolite |
Wt. |
Price |
| Mustang, 5.0L GT & Cobra, 10.5" |
86-95 |
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600410 |
14.3 |
$517 |
| Mustang, 4.6L GT, T45 Trans & 96-98 4.6L Cobra 32v, 10.5" |
96-2/01 |
6 Bolt
8 Bolt |
600420
600430 |
14.2
14.2 |
$508
$508 |
| Mustang Cobra, 4.6L, 8 CYL, Supercharged Cobra, 11" |
01-04 |
6 Bolt
8 Bolt |
600420
60043 |
14.2
14.2 |
$508
$508 |
| Mustang GT, 4.6L, 8 CYL, 11" |
05-06 |
6 Bolt
8 Bolt |
600420
60043 |
14.2
14.2 |
$508
$508 |
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T-5 Bearing retainers
Provides smoother clutch action and a lighter pedal feel than aluminum. The steel sleeve will not gall and hang up the throw-out bearing like the original aluminum retainer. 1994-95 cars received this upgrade from the factory but require a slightly longer retainer. The CL-1A for use in 1994-95 cars is the same style, but is equivalent to the OEM part on these years. |
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Throw-out bearings
Fits any 1979-00 Ford rear wheel drive |
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Pilot Bearings
Fits any 1979-2004 Ford rear wheel drive. |
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| Years |
T-5 Transmission |
P/N |
Price |
| - 93 |
Input Shaft Bearing retainer |
CL-1 |
$54 |
| 94 - 95 |
Input Shaft Bearing retainer |
CL-1A |
$54 |
| 79 - 04 |
Clutch Throw-Out Bearing |
CL-4 |
$35 |
| 79 - 95 |
Input Shaft Pilot Bearing |
CL-5 |
$19 |
| 96 - 04 |
Input Shaft Pilot Bearing |
CL-5A |
$19 |

| Clutch Cable Packages |
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Clutch Cable, Quadrant, and Firewall Adjuster Package
This kit has everything you need to install a new, high quality Ford clutch cable that will outlast and perform every aftermarket cable we have seen. No cables match or even come close to the quality and construction of the Ford manufactured cables. The firewall adjuster and aluminum quadrant will provide easy adjustment of cable free play from within the engine compartment, rather than under the car, which is common on all adjustable cables. |
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Quadrant, and Firewall Adjuster Package
Save by purchasing these two parts as a package. Both items are available separately. This kit lets you adjust your OEM Mustang clutch cable at the firewall rather than by the plastic self adjusting mechanism that comes from the factory. Works with all OEM and most aftermarket clutch cables. The firewall adjuster and aluminum quadrant will provide fast and easy adjustment of cable free play from within the engine compartment, rather than under the car, which is common on all adjustable cables. We don't recommend using any aftermarket or adjustable cables due to poor construction and quality. Pedal effort is significantly increased with aftermarket cables due to high friction between the cable and housing. |
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| Clutch Cable Packages |
Description |
P/N |
Price |
| Mustang |
MM Clutch Quadrant,
MM Firewall Adjuster,
MM Universal Ford OEM Clutch Cable |
MMCP-51 |
$144 |
| Mustang |
MM Clutch Quadrant,
MM Firewall Adjuster, without cable |
MMCP-52 |
$75 |

| Clutch Accessories |
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MMCL-3 Clutch Cable Firewall Adjuster, 1982-2004
This beautiful machined aluminum adjuster, allows the use of our universal clutch cable and aluminum clutch cable quadrant so you can adjust your clutch cable tension easily from under the hood. Aftermarket cables are much lower quality, and require the stock plastic adjustment mechanism or can be adjusted down at the transmission clutch fork. Our adjusters are easily adjusted from where the cable passes through the firewall near the brake master cylinder. Our adjuster has more adjustable length than many other adjusters making it best suited to all the year ranges of Mustangs. We found that 1994-95 Mustang stock cables required more adjustment than earlier or later clutch cables. It works with all stock clutch cables or with most aftermarket cables (although we don't recommend or sell them due to poor quality). |
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MMCL-6 Clutch Quadrant: Maximum Motorsports raises the bar by manufacturing a clutch quadrant to replace the brittle plastic factory quadrant. The strong, yet lightweight (only 4.4 oz.) CNC aluminum quadrant was MM's engineering department's answer to the shortcomings of all other clutch quadrants. It allows the use of a durable stock style cable, not requiring an adjustable cable. A firewall adjuster is required.
It is the details that separates the Maximum Motorsports Clutch Quadrant from all others.
Works with a durable stock cable because MM designed the quadrant and the firewall adjuster around the stock cable. All other quadrants require aftermarket adjustable cables which stretch, break, collapse and melt much easier than the factory cable. |
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The mounting hole diameters are critical. Too loose and the quadrant will "wobble" side to side adding slop to the pedal feel. Too tight and it wont fit. MM hold a very tight tolerance during manufacture to ensure the proper fit.
The slotted second hole is Maximum Motorsports' solution to Ford's loose tolerance on the distance between the two shafts that hold the quadrant. To deal with this problem, some manufactures make the second hole extra large to fit all cars. Others do not use a hole at all and allow the quadrant to rest on top of the second shaft. Both methods result in a loose, rattling pedal.
A stock quadrant radius is used on the MM Clutch Quadrant. A larger radius is not necessary and will cause three problems. It increases pedal effort, causes the clutch cable to rub on the cable housing at the firewall, prematurely wearing it out, and it overstrokes the pressure plate. A smaller radius won't allow the clutch to fully disengage.
A machined flat to allow the cable end to sit square. Other companies use too large a radius thus bending the end of cable. This unnecessary stress leads to broken clutch cables.
MM's machined the correct side of quadrant to make installation easier. One end of the clutch quadrant is machined thinner than the rest. This is to make installation much easier on pre 1994 cars that have a support bracket which complicates quadrant access. Most manufacturers machine the wrong side of the quadrant, which makes installation difficult and frustrating. This makes it easy to see who copies problems and who solves problems. The MM Clutch Quadrant is machined correctly, thus solving the installation problem.
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MMCL-11 Clutch Cable, Universal Ford OEM, 1982-04
MM's has done a lot of research on clutch cables, buying and testing almost every different cable on the market we could find. MM's has found after all this investigation, that the OEM Ford Clutch Cables are the best quality cables available. They have a multi-material, layered construction that provides better heat, friction and collapsibility protection than all the aftermarket cables we dissected. |
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MM's has developed a clutch adjustment package that will work with all OEM Ford cables. MM's Quadrant, firewall package will allow the use of all OEM Ford cables (and adjustable cables, too), however the cables all require some minor modifications. We also sell a package with the MM Universal Ford OEM cable, which comes with all the parts you need to install a Ford quality cable with an aluminum quadrant and firewall adjuster, that requires no additional cable modifications. This universal cable will provide more header clearance, and therefore even better heat protection, than any other cable MM's has found, including the 5.0 liter engine OEM Ford cables!! This cable, quadrant and firewall adjuster can be the answer to all your clutch cable problems! |
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MMCL-14 Clutch Cable Insulator:
Protect your clutch cable with Maximum Motorsports Clutch Cable Insulator. This high-temperature resistant phenolic material insulates the clutch cable housing from the heat of the bellhousing. While road racing we discovered that the transmission bellhousing would heat soak to such an extent (We measured bellhousing temperatures of over 300 degrees) that the clutch cable outer housing was melting. This can cause intermittently high pedal effort, poor clutch release, and eventually complete failure of the clutch cable. The MM Clutch Cable Insulator greatly reduces heat soak into the clutch cable, prolonging its life. For installation a firewall Adjuster or adjustable clutch cable is required.
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MMCL-15 Clutch cable heatshield:
Protect your clutch cable with Maximum Motorsports Clutch Cable Heat Shield. This high-temperature resistant material shields the clutch cable housing from radiant heat. The high heat radiating from the headers and exhaust can cook the clutch cable and cause high pedal effort, poor clutch release, and eventually complete failure of the clutch cable. The MM Clutch Cable Heat Shield greatly reduces how much radiant heat reaches the clutch cable, prolonging the life of the cable. Each kit includes 12 inches of heat shield material, and can be installed without any disassembly of the clutch cable. |
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| Clutch Cable Accessories |
Years |
P/N |
Price |
| MM Firewall Adjuster Assembly |
82 - 04 |
MMCL-3 |
$40 |
| MM Aluminum Clutch Quadrant |
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MMCL-6 |
$35 |
| MM Universal Ford OEM Clutch Cable |
82 - 04 |
MMCL-11 |
$69 |
| MM Clutch Cable Insulator |
82 - 04 |
MMCL-14 |
$8 |
| MM Clutch Cable Heat Shield |
79 - 04 |
MMCL-15 |
$10 |
| OEM Clutch Cable |
96 - 04 |
CL-9 |
$58 |
| OEM Clutch Cable |
82 - 93 |
CL-12 |
$146 |
| OEM Clutch Cable |
94 - 95 |
CL-13 |
$127 |

Clutch Pedal Height Adjuster
Driving your car will be easier after installation of Maximum Motorsports' Clutch Pedal Adjuster Kit. This kit allows adjustment of the clutch pedal's height to suit your taste. The original placement of the clutch pedal is about two inches above the brake pedal. This makes smooth and fast driving more difficult, as your feet must find pedals that are placed at three different heights. This easy-to-install kit allows you to adjust the clutch pedal to the same height as the brake pedal, or even slightly below or above it.
This kit requires an aftermarket clutch quadrant and either an adjustable clutch cable or a firewall cable adjuster. |
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MMCL-7
Clutch Pedal Height Adjuster,
1994-04
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MMCL-10
Clutch Pedal Height Adjuster,
1982-93
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| Clutch Pedal Adjuster |
Years |
P/N |
Price |
| Mustang |
82 - 93 |
MMCL-10 |
$19 |
| Mustang |
94 - 04 |
MMCL-7 |
$19 |

| Maximum Motorsports IRS Differential Cooler Kit |
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OC-10 Differential Oil Cooling System, fits 1999-2004 Cobra with IRS
Keep the differential temperature down and avoid burning-up the stock Ford Traction-Lok differential in your 1999-2004 Cobra with MM's IRS Differential Cooler. The IRS center section is subjected to much more heat than a solid axle differential. The additional heat comes from the exhaust being routed directly underneath the IRS differential, the reduced fluid capacity of the IRS center section, and the absence of large steel axle tubes to act as heat sinks. The Cobra IRS has gained a reputation for burning up the Traction-Lok differential during spirited driving and open-track events. With MM's new Differential Cooler kit, costly limited slip failures caused by excessive heat can be avoided.
Note: Fits aftermarket differential cover braces, with a minor modification to the brace. |
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| Tool Package for IRS Diff Cooler |
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MMT-7 Tool Package for OC-10 Installation
There is no need to spend time searching for the proper taps and drill bits with this Tool Package. Includes the thread taps required to install the OC-10 IRS Differential Cooler, and the correct matching drill bits for those taps. Thread taps included are 1/4-18 NPT and 3/8-18 NPT; drill bits included are 7/16", 9/16" reduced shank, and 3/4" reduced shank. |
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| Model |
Year |
Description |
P/N |
Price |
| Mustang Cobra |
99 - 04 |
IRS Differential Cooler Kit |
OC-10 |
$1,324 |
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IRS Differential Cooler Temp Sensor |
OC-11 |
$80 |
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Tool Package for OC-10 Installation |
MMT-7 |
$74 |

McLeod Clutch Packages
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To select your clutch package use the steps below:
1. Identify the application for your car.
2. Select the appropriate level
3. Choose either a steel or aluminum pressure plate.
4. Choose your disk |
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Step 1. Identify the application for your car.
1979-85 Mustang 5.0L and 4.2L V8
We recommend against reinstalling the original size (10") clutch in these cars. The 1979 to 1985 V-8 Mustangs were equipped with 10" clutches from the factory. We recommend replacing the stock system with the upgraded McLeod 10.5" clutch/pressure plate system. Upgrading to the 10.5" clutch will require McLeod Flywheel part # 463100 or 563100, with the proper counterbalance, in place of the factory flywheel.
Besides having many more disk and pressure plate options, the 10.5" systems will provide more clamping force, lower pedal effort, and a much higher torque capacity than replacement 10" systems. Once the proper flywheel is in place, any of the clutch systems from the "1986-95" Application Table can be installed.
1986-95 5.0L incl. 1993-95 Cobra
These vehicles accept the excellent McLeod 10.5" clutch systems with no modifications. Simply select a package that suits your needs and bolt it in place. McLeod direct replacement aluminum and steel flywheels are also available for these vehicles. Refer to the McLeod flywheel applications.
1996-2004 GT and 2001-02 Bullitt
1996-2000 - The McLeod 10.5" clutch systems are direct replacements for the SOHC 2V GT. Simply choose the 10.5" system of your choice from the application table below and bolt it into place. These cars were originally equipped with a T-45 transmission and 10.5" clutch.
2001 - If your car is a 2001 model, you must check the vehicle transmission code to confirm which transmission and clutch size is in your vehicle. During this model year (from February, 2001) Ford began using the Tremec 3650 transmission and an 11" clutch in Mustang GT's and Bullitts. All of these cars built after February, 2001 should have a Tremec 3650 and an 11" clutch from the factory. The transmission code can be found on the Vehicle Certification (VC) label, located on the driver's side doorjamb. Item nine on the VC label, under the heading "TR", is the transmission code.
* If your car has a code "6", indicating a Borg Warner T-45 transmission, then choose one of the McLeod 10.5" clutch systems from the 1996-2001-1/2 listing in the application table below.
* If your car has a code "K", indicating a Tremec 3650 transmission, you may choose one of the McLeod 11" clutch systems from the 2001-1/2-2004 listing in the application table below. Or, read the next section for 2001-1/2-2004 cars about upgrading to the McLeod 10.5" clutch system
Installation note: Ford used non-conventional 11" clutch disks that were .270" thick on these cars, along with a pressure plate designed for a .270" disc thickness. McLeod produces all their disks to the standard conventional Ford thickness of .310". McLeod 11" clutch systems therefore require the use of the supplied shim between the pressure plate and flywheel. This allows the Ford-style pressure plate in these clutch packages to function properly with the .310" thick McLeod 11" disk.
2001-1/2-2004 - These cars came with a Tremec 3650 transmission and an 11" clutch. The McLeod 11" clutch systems are direct replacements. You may simply choose the 11" clutch system of your choice from the application table below and bolt it into place. Or, you can upgrade to a McLeod 10.5" system. We recommend upgrading from the stock 11" clutch to a 10.5" system with one of the McLeod flywheels because there are many more disk and pressure plate options available. The 10.5" clutch systems also provide more clamping force and have lower pedal effort than the replacement 11" systems. To do this upgrade, a McLeod flywheel (part # 463406 or 563406) must be installed to provide the proper mounting holes for the pressure plate. Refer to the McLeod flywheel applications for more information.
Note: The above McLeod flywheels (part # 463406 and 563406) are for the 10.5" upgrade, and they WILL NOT accept the stock 11" clutch disk and pressure plate system used on 2001-1/2-2004 cars equipped with the Tremec 3650 transmission. Refer to the McLeod flywheel applications for more information
1996-2004 Cobra, 2003-04 Mach 1
1996-98 - The McLeod 10.5" clutch systems are direct replacements for these Cobras. Simply choose the 10.5" system of your choice from the application table below and bolt it into place. McLeod direct replacement aluminum and steel flywheels are also available for these vehicles. Refer to the McLeod flywheel applications to select the proper part number.
1999 - These Cobras MUST be disassembled and inspected to confirm the clutch size. Ford began introducing the 11" clutch on Cobras in 1999. Some cars were assembled with 10.5" clutches, and others with 11" clutches.
* If your Cobra has a 10.5" clutch, simply choose a 10.5" system from the application table below, and bolt it into place.
* If your Cobra has an 11" clutch, you may simply choose a McLeod 11" (standard size hub) clutch system from the application table below, and bolt it into place. Or you can upgrade to the McLeod 10.5" clutch system-see the Upgrade to 10.5" section.
2001-2004 - These Cobras & 2003-04 Mach 1's came with 11" clutches. The McLeod 11" (standard size hub) clutch systems are direct replacements for these cars. You may simply choose a McLeod 11" clutch system from the application table below, and bolt it into place. Or you can upgrade to the McLeod 10.5" clutch system-see the Upgrade to 10.5" section.
Installation note: Ford used non-conventional 11" clutch disks that were .270" thick on these cars, along with a pressure plate designed for a .270" disc thickness. McLeod produces all their disks to the standard conventional Ford thickness of .310". McLeod 11" clutch systems therefore require the use of the supplied shim between the pressure plate and flywheel. This allows the Ford-style pressure plate in these clutch packages to function properly with the .310" thick McLeod 11" disk.
Tremec TKO, TKO II conversions
The Tremec TKO and TKO II transmissions are popular upgrades for Mustangs. They are very similar to the Tremec 3550 (1995 Cobra R) transmission, but have an input shaft with a GM style 1-1/8" x 26 spline and slightly different internals. We recommend the 10.5" McLeod systems listed over the 11" systems because the 10.5" pressure plates provide higher clamping force with lower pedal effort, and there are more 10.5" clutch package options available.
While the TKO and TKOII do not require special flywheels for installation on a Mustang, your flywheel MUST be inspected to see if it accepts 10.5" and/or 11" clutch. This will dictate which clutch size options can be installed. An option is to purchase the correct McLeod Flywheel for the clutch size desired. Please refer to the McLeod flywheel applications to find the appropriate flywheel for your application.
Installation note: Ford used non-conventional 11" clutch disks that were .270" thick, along with a pressure plate designed for a .270" disc thickness. McLeod produces all their disks to the standard conventional Ford thickness of .310". McLeod 11" clutch systems therefore require the use of the supplied shim between the pressure plate and flywheel. This allows the Ford-style pressure plate in these clutch packages to function properly with the .310" thick McLeod 11" disk.
Step 2. Select the appropriate Level
Stage 1 - Excellent for daily driving, Auto-X, or occasional open track events. Features a 20% reduction in pedal effort from stock with increased clamping force, 375 HP capacity and organic disk.
Stage 2 - These are for Mustangs that see a few open track events or autocrosses a year and are regularly driven on the street. Pedal effort about 10% greater than stock, holds 425 HP, uses an organic disk.
Stage 3 - Less street manners, but added durability for a road raced or drag raced Mustang where speed shifts or launches result in high clutch temperatures. Same pedal effort as Stage 2. Dual friction Kevlar/organic disk, 425 HP capacity.
Stage 4 - Applications up to 500HP. Good for drag racing and high horsepower street applications. Sintered Iron friction material should not be used with a stock flywheel.
Step 3. Select Aluminum or Steel Pressure Plate
Step 4. Disc Type (Hub and Friction Materials)
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Organic Friction Material - All Mustangs came stock with organic friction material because of its excellent driveability characteristics. McLeod uses a unique friction compound in their organic disks. They have a higher heat capacity than both stock and other aftermarket organic disks. This is a good choice for most Mustangs used on the street, and even for racing. This material should be sufficient for 95% of Mustang owners with typical street-legal bolt on parts. The McLeod organic disks that we offer are all constructed with marcels.
Marcels - A clutch disk with marcel construction has the friction material of both sides backed by thin metal plates. Between these two plates are thin bowed pieces of steel (marcels), which act as springs when the disk is sandwiched between the flywheel and pressure plate. When the clutch pedal is let out, the marcels are flattened, and gradual engagement of the clutch is achieved. Marcels are more critical than a sprung hub in providing chatter-free clutch operation. Disks without marcels usually have poor driveability, unless the friction material has some compressibility (as sintered iron does). Over time, the marcels in a disk can lose their springiness and flatten out, increasing the likelihood of chatter.
Kevlar Friction Material - While this material typically has a lower coefficient of friction than organic materials at room temperature, it's coefficient of friction increases with elevated temperature. This means that as a Kevlar disk is heated during hard use, its torque capacity will increase, whereas an organic compound disk will lose torque capacity when its temperature is increased. Another advantage of Kevlar is its durability and resistance to wear. It will not burn as easily as organic compounds when slipped excessively. Burning causes permanent damage to the disc and a reduction in the coefficient of friction. The wear characteristics of Kevlar are significantly better than organic materials, making Kevlar a good choice for racing applications. The downside to Kevlar disks is that they have a high propensity to chatter when slipped. This makes them a poor choice for daily driven street cars, and weekend-only cars that are driven in stop-and-go traffic. Even though many other companies try to sell Kevlar clutch systems to street car owners, Maximum Motorsports wants to provide you with as much information as possible, and we do not recommend Kevlar clutches for extensive street driving. The Kevlar/organic McLeod disks that we list are all constructed with marcels, to reduce chatter as much as possible.
Sintered Iron Friction Material - Similar to Kevlar, sintered iron's coefficient of friction at room temperature is lower than organic friction material, but increases even more dramatically when its temperature rises. This is a very aggressive material, and therefore should only be used on steel flywheels or aluminum flywheels with a steel insert. While sintered iron is slightly compressible, it is not very flexible, so the McLeod sintered iron discs we list are constructed without marcels. This, combined with the high coefficient of friction when hot, causes sintered iron discs to provide only slight modulation. While McLeod sintered iron systems are reportedly subtler than other brands', they are still quite aggressive and we recommend them only for very high horsepower street cars, or all-out track cars. The non-marcel McLeod sintered iron disks will operate more smoothly than non-marcel organic or Kevlar disks because of the slightly compressible characteristic of the sintered iron friction material.
Solid Hub - This eliminates the torsional spring mechanism and is two pounds lighter than a sprung hub disk. Allows quicker shifts, prolongs synchro life. Has good driving characteristics with virtually no chatter. An increase in driveline noise under high load and low RPM can be expected.
Sprung Hub - The torsional spring mechanism on the disk cushions the transmission gears and bearings from driveline impact when driven aggressively. Does not significantly reduce clutch chatter. |
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| Ford Disk, Sprung Hub, Organic Friction Material |
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| McLeod Disk, Solid Hub, Organic Friction Material |
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| McLeod Disk, Sprung Hub, Kevlar Friction Material |
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Make sure to get a new pilot bearing and throwout bearing when changing the clutch. Also, this is a great time to flush and fill your transmission while it is out of the car.
10.5" clutch packages
If you determined from the last section, that your car already does have a 10.5" clutch, or you plan to convert your 11" clutch to the 10.5", look in this section. If your car has the 11" clutch, and aren't converting, look to the 11" category.
| McLeod Clutch Package |
Size |
Level |
Press. Plate |
Disk |
P/N |
Price |
| Mustang GT, 86 - 01½ & Cobra 93 - 98 |
(10.5" disk) |
Stage 1 |
Steel |
sprung hub, organic material |
CP-1 |
$300 |
| Mustang GT, 86 - 01½ & Cobra 93 - 98 |
(10.5" disk) |
Stage 1 |
Steel |
solid hub, organic material |
CP-2 |
$352 |
| Mustang GT, 86 - 01½ & Cobra 93 - 98 |
(10.5" disk) |
Stage 2 |
Steel |
sprung hub, organic material |
CP-3 |
$325 |
| Mustang GT, 86 - 01½ & Cobra 93 - 98 |
(10.5" disk) |
Stage 2 |
Steel |
solid hub, organic material |
CP-4 |
$378 |
| Mustang GT, 86 - 01½ & Cobra 93 - 98 |
(10.5" disk) |
Stage 2 |
Aluminum |
sprung hub, organic material |
CP-5 |
$832 |
| Mustang GT, 86 - 01½ & Cobra 93 - 98 |
(10.5" disk) |
Stage 2 |
Aluminum |
solid hub, organic material |
CP-6 |
$885 |
| Mustang GT, 86 - 01½ & Cobra 93 - 98 |
(10.5" disk) |
Stage 3 |
Steel |
sprung hub, Kevlar material |
CP-7 |
$372 |
| Mustang GT, 86 - 01½ & Cobra 93 - 98 |
(10.5" disk) |
Stage 3 |
Aluminum |
sprung hub, Kevlar material |
CP-8 |
$879 |
| Mustang GT, 86 - 01½ & Cobra 93 - 98 |
(10.5" disk) |
Stage 4 |
Steel |
sprung hub, sintered iron material |
CP-9 |
$489 |
| Mustang GT, 86 - 01½ & Cobra 93 - 98 |
(10.5" disk) |
Stage 4 |
Aluminum |
sprung hub, sintered iron material |
CP-10 |
$996 |
| Tremec TKO & TKO II |
(10.5" disk) |
Stage 2 |
Steel |
sprung hub, organic material |
CP-14 |
$325 |
| Tremec TKO & TKO II |
(10.5" disk) |
Stage 2 |
Steel |
solid hub, organic material |
CP-15 |
$378 |
| Tremec TKO & TKO II |
(10.5" disk) |
Stage 2 |
Aluminum |
sprung hub, organic material |
CP-16 |
$832 |
| Tremec TKO & TKO II |
(10.5" disk) |
Stage 2 |
Aluminum |
solid hub, organic material |
CP-17 |
$885 |
| Tremec TKO & TKO II |
(10.5" disk) |
Stage 3 |
Steel |
sprung hub, Kevlar material |
CP-18 |
$372 |
| Tremec TKO & TKO II |
(10.5" disk) |
Stage 3 |
Aluminum |
sprung hub, Kevlar material |
CP-19 |
$879 |
| Tremec TKO & TKO II |
(10.5" disk) |
Stage 4 |
Steel |
sprung hub, sintered iron material |
CP-20 |
$489 |
| Tremec TKO & TKO II |
(10.5" disk) |
Stage 4 |
Aluminum |
sprung hub, sintered iron material |
CP-21 |
$996 |
11" clutch packages
If you determined from the last menu, that your car comes with an 11" clutch, and are not willing to convert to the 10.5" system, this is the section for your car. If you are converting to the 10.5" clutch, you will have to change flywheels, and can then select from the 10.5" clutch category.
| McLeod Clutch Package |
Size |
Level |
Press. Plate |
Disk |
P/N |
Price |
| Mustang GT, 01½ - 03 & Cobra, 99 - 04 |
(11.0" disk) |
Stage 2 |
Steel |
sprung hub, organic material |
CP-11 |
$365 |
| Mustang GT, 01½ - 03 & Cobra, 99 - 04 |
(11.0" disk) |
Stage 3 |
Steel |
sprung hub, Kevlar material |
CP-13 |
$421 |
| Tremec TKO & TKO II |
(11.0" disk) |
Stage 2 |
Steel |
sprung hub, organic material |
CP-22 |
$372 |
| Tremec TKO & TKO II |
(11.0" disk) |
Stage 3 |
Steel |
sprung hub, Kevlar material |
CP-23 |
$411 |

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McLeod Flywheels, Aluminum
Lose 9 lbs of rotating weight! An aluminum flywheel will allow your engine to rev quicker, accelerate harder, and makes it easier to match RPM's while downshifting. McLeod drills their flywheels for both 10.5" and 11" pressure plate bolt patterns and uses removable flat head socket cap screws to secure the counterweights, not flimsy rivets. |
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| McLeod Aluminum Flywheels |
Years |
Description |
P/N |
Price |
| Mustang 5.0L |
80 - 95 |
50oz. Imbalance, 157 tooth |
563100-50 |
$509 |
| Mustang 5.0L stroker applications |
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28oz. Imbalance, 157 tooth |
563100-28 |
$491 |
| Mustang GT, 4.6L |
96 - 98 |
6-Bolt, Neutral Balance, 164 tooth |
563406 |
$475 |
| Mustang GT, 4.6L |
01 - 02 |
6-Bolt, Neutral Balance, 164 tooth |
563406 |
$475 |
| Mustang Cobra 4.6L |
96 - 02 |
8-Bolt, Neutral Balance, 164 tooth |
563408 |
$475 |
| Mustang 4.6L |
99 - 00 |
8-Bolt, Neutral Balance, 164 tooth |
563408 |
$475 |

| Pro 5.0 "Power Tower" Shifter |
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Shifter Accessories |

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Pro-5.0 "Power Tower" Shifters: These shifters set the standard in aftermarket shifters. With a 33% shorter throw, they eliminate sloppy and missed shifts. Heavy duty heat-treated stops prevent overstressing your transmission's internals. The one of a kind 2nd to 3rd offset shift mechanism makes shifting to 3rd a breeze. Made from billet aluminum with an unbreakable billet steel handle. Works with your factory console, knob, and boot. |
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Shift Lever: This lever is shorter than stock and fits the stock shifter. It bolts on without the stock rubber grommets for more precise shifting. |
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Shift Lever Bushings: These bushings replace the stock rubber grommets in your factory shift lever, eliminating that vague feeling the stock shifter has. Required when installing PROSL-1. |
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| Model |
Years |
Description |
P/N |
Price |
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Description |
P/N |
Price |
| Mustang Cobra |
2003 |
Tremec (AMT-56) |
PROTR3 |
$191 |
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Shift Lever, fits all PRO 5.0 shifters |
PROSL-1 |
$30 |
| Mustang Cobra |
01 - 02 |
Tremec (3650), code K |
PROTR2 |
$191 |
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Shift Lever Bushings |
PROSS |
$10 |
| Mustang Bullitt and GT |
01 - 03 |
Tremec (3650), code K |
PROTR2 |
$191 |
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| Mustang |
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Tremec (3550) |
PROTR |
$191 |
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| Mustang |
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T-5 & T-45, code 5 or 6 |
PRO5 |
$186 |
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Torsen Limited Slip Differential, T2R, 28 or 31spline, Ford 8.8, 1986-04
The Torsen is the ultimate performance differential. The Torsen's unique torque-sensing ability keeps engine power going to the ground during changing traction conditions. The Torsen functions as an open differential as long as the amount of torque transmitted to each rear wheel remains equal. When one tire begins to lose traction, the Torsen instantly senses the change in torque being applied to the ground. The excess torque that cannot be delivered to the ground by the tire that is beginning to lose traction is delivered to the opposite tire, which has better traction and can take more torque. |
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The Torque Bias Ratio (TBR) is the ratio indicating how much more torque the Torsen can send to the tire with more available traction, than is used by the tire with less traction. This ratio represents the "locking effect" of the differential.
The 4:1 TBR of the Torsen T-2R means that this differential is capable of delivering up to four times as much torque to the tire with better traction than is delivered to the tire with the least available traction. By comparison, the Torsen T-2R can deliver about 2.5 times as much torque to both rear tires, collectively, as an open differential can, given the same conditions.
During braking there is little or no torque being conveyed to the differential, and so there is little or no torque difference between the two rear tires. Therefore, the Torsen differential will not support any appreciable torque "wind-up" between the two rear tires during braking. Because of this, the Torsen differential does not interfere with the functioning of anti-lock brake systems. |
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The clutch plates of the Mustang's stock Traction-Lock differential wear out, requiring periodic replacement to maintain its functionality. This wear causes axle endplay on a solid axle car, which in turn increases brake pad kickback. Axle endplay does not increase over time with a Torsen differential because it does not have clutch plates to wear out. This makes the Torsen differential ideal for use with fixed-mount brake calipers.
While it is ideal for street use, autocrossing, and road racing, the Torsen differential is not recommended for drag strip use. The Torsen differentials fit Mustang 8.8" rear-ends, both solid axle and IRS, and are available in 28 spline and 31 spline versions. |
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| Mustang |
Years |
Axle Shaft |
P/N |
Price |
| Ford 8.8 |
86 - 04 |
28 spline, T-2R |
TOR-F88ZT28HBI |
$701 |
| Ford 8.8 |
86 - 04 |
31 spline, T-2R |
TOR-F88ZT31HBI |
$701 |
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