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The best way to gain a prominent advantage over the competition is to do it with the MFactory Helical Limited Slip Differential. The smooth consistent distribution of power to the wheels with the MFactory Helical LSD puts the power-to-the-ground and maximizes your vehicle's traction. A must for any car be it street, strip, or track.

What exactly does an LSD do you ask? Without an LSD your car is actually 1 wheel drive, in that it can't supply torque to both wheels at the same time and will only supply torque to the wheel with less grip, which is what the shortfall is to an open differential (what most vehicles have).

An LSD only lets the wheels spin at different speeds by a limited amount (typically this is a percentage difference) which is when the differential locks and both wheels get power. This is not how locked differentials work such as in off-road trucks which supply equal torque and rotational speed to both rear wheels at the same time, which can cause issues with handling.

Features:

An industry first, 30-day Feel the Torque™ money back guarantee and a Limited-Lifetime Warranty!
Forged and Cryo-tempered
Advanced Shot Peening technology for increased surface hardness
Designed to withstand the extreme shock loads of competition-level drag racing
Maintenance-free gears eliminate the need for special fluid or rebuilds associated with typical plate LSDs.
Lock-free operation ensures no adverse steering response.
**As a break-in procedure, we recommend changing the fluid after the first 3-400 miles of use.**

Includes $500 core charge to be refunded when we receive your rebuildable core.

Upgrade the holding power of your clutch with the Clutch Masters FX250 clutch kit.

FX250 (Stage II)

• Extra long life street system
• Holding capacity 70% over stock
• Heavy-Duty reinforced pressure plate
• Sprung organic/fiber tough disc

All Clutch Masters clutch kits come complete with:

• Pressure Plate
• Clutch Disc
• Throw-out Bearing
• Pilot Bearing or Bushing
• Alignment Tool
• Pressure Plate Bolts

This clutch kit does not include a flywheel. Requires use of single mass flywheel 

Advanced Clutch Technology (ACT) designs, engineers and develops products by leveraging decades of track and performance street experience. Advanced CAD, FEA simulation, and CAM tools help ensure highly optimized performance, reliability, and repeatability. These key advantages are produced by combining the best engineering and design methodologies with the latest in materials and manufacturing techniques.

ACT clutch kits stand unequaled in terms of consistent pedal feel, high torque capacity, long wear life and durability. In-house manufacturing is critical in tuning components specifically to each individual application while maintaining the predictable ACT pedal feel across the entire catalog.

This clutch kit features a Heavy Duty pressure plate, a Performance Street sprung clutch disc, and an XACT Streetlite Flywheel.

The heavy duty pressure plate included offers a 20-50% clamp load increase, stock-moderate  pedal feel, and heat treated diaphragms for increased strength and performance.

Next in this kit is the R6 racing clutch disc. This disc is an unsprung, rigid disc with 6 pads that is best suited for drag and road racing and handles heat better thanks to its increased surface contact area versus the 4 pad version of this disc, the R4. The R6 pads are composed of ceramic friction materials and the disc has a chome-moly hub that is heat treated for additional strength under high load engagements. Over stock, this disc is much better for faster shifting and significantly higher torque loads. Unlike the stock disc, this racing disk has a slightly shortened life span due to its rigid design and pad composition. This in turn is offset thanks to its fast, aggressive engagement for track use.

The final main component is the XACT Streetlite Flywheel. This option is the most popular thanks to it versatility for street driving and drag/track style racing, its lighter weight for increased throttle response, and its single mass design.

Clutch Kit Specs:

• Torque Rating: 505 ft/lbs
• 83% torque capacity increase over stock!
• Type of Disc: Racing
• 10-count spline
• Spline Size: 1-1/8" inch
• Disc Weight: 2.4 lbs
• Pressure Plate Weight: 11.2 lbs
• Flywheel Weight: 15.9 lbs
• 1 year Warranty from retail purchase date!

Fitment in following BMWs:
E36 BMW - Non-M submodels, ACT recommends upgrading to the E36 M3 Slave cylinder for best clutch operation.
E46 BMW - Non-M submodels, For vehicles with 5 speed transmissions only. Fits 325i/Ci models with a production date up to 03/2003.
Z3 BMW - Non-M submodels,  ACT recommends upgrading to the E36 M3 Slave cylinder for best clutch operation.

Differential bushings are responsible for keeping the differential in solid alignment while dampening drivetrain vibration. While OE rubber bushings are fine when they are new from the factory, aged and worn out rubber bushings create a multitude of issues that can range from annoying to dangerous. As a factory bushing ages, it begins to harden and become brittle. When this happens the bushing will actually shrink and allow for movement at the differential mounting point. At this point, the differential is free to shift under load causing a noticeable clunking noise under acceleration and deceleration and massively increasing the stress on the driveshaft and axles. Manual transmissions suffer the worst from this as it can make shifting difficult since the differential will shift when the clutch is engaged and disengaged.

By replacing these bushings with full polyurethane, the movement is eliminated since the mounting point is supported by a much stiffer material that will not harden or shrink over time. This means less stress on the driveshaft and axles and greater longevity of supporting components. 

Engineered to perform, Powerflex performance polyurethane differential bushings offer a supreme level of control, while still providing enough comfort for the street, with advanced polyurethane that reduces NVH that often accompanies lesser bushings. Expect improved acceleration response, more direct shifting feel and overall improved drivetrain composure with Powerflex performance polyurethane bushings.

Poweflex is a leading manufacturer of aftermarket suspension bushings. Using state of the art design and manufacturing, all replacement bushings are engineered to out-perform and out-last the ones that came in the car. Each line of bushings is meticulously tested and then re-tested to ensure perfect fitment and enduring quality through the life of the vehicle. A full lifetime warranty backs every one of their products and demonstrates the level of confidence and commitment Powerflex has to their customers. 

Upgrade the holding power of your clutch with the Clutch Masters FX250 clutch kit.

FX250 (Stage II)

• Extra long life street system
• Holding capacity 70% over stock
• Heavy-Duty reinforced pressure plate
• Sprung organic/fiber tough disc

All Clutch Masters clutch kits come complete with:

• Pressure Plate
• Clutch Disc
• Throw-out Bearing
• Pilot Bearing or Bushing
• Alignment Tool
• Pressure Plate Bolts

This clutch kit does not include a flywheel. Requires use of single mass flywheel