Stock rubber flex discs allow for a slight amount of give, especially under heavy acceleration and, depending on the amount of force applied, could potentially tear or split. This slight flex/give can prevent instantaneous transfer of force to the wheels, making accelerations unpredictable, or even lead to your vehicle being stuck on the side of the track. To combat this, IRP's Performance Flex Disc was developed. Made of CNC machined aluminum, this flex disc won't actually flex, and the polyurethane bushings will only provide a enough give to dampen some vibrations and prevent damaging the transmission. This is perfect for high torque applications such a drag cars and dedicated track cars that want immediate response and long term reliability.

96mm Diameter

Fits the following BMWs:
2008+ E82 BMW 128i
5/1986-1991 E30 BMW 325e 325es M3 - Manual Transmission 
1987-1991 E30 BMW 325ix - Between Transmission & Transfer Case
1996-1998 E36 BMW 328i 328is 328ic - Manual Transmission only 
1999-2005 E46 BMW 323i 323ci 325i 325ci - Automatic & SMG Transmissions only 
1999-2005 E46 BMW 328i 328ci 330i 330ci - Manual, Auto, and SMG
2006+ E90 BMW 325i 328i 330i - Manual or Automatic Transmission 
2006+ E91 BMW 328i - Manual or Automatic Transmission 
2007+ E92 BMW 328i - Manual or Automatic Transmission 
2007+ E93 BMW 328 - Manual or Automatic Transmission 
1982-1983 E28 BMW 528e - Manual Transmission
5/1986-1988 E28 BMW 528e - Manual Transmission
1982-1988 E28 BMW 533i 535i 535is M5 - Manual Transmission 
1991-1995 E34 BMW 525i - Automatic Transmission
1989-6/1992 E34 BMW 525i - Manual Transmission
1993-1995 E34 BMW 530i - Manual or Automatic Transmission
1989-1993 E34 BMW 535i - Manual Transmission
2001-2003 E39 BMW 525i - Automatic Transmission
1997-2003 E39 BMW 528i 530i - Manual or Automatic Transmission 
1980-1989 E24 BMW 633csi 635csi M6 - Manual Transmission
2000-2006 E53 BMW X5 3.0i - for Rear Driveshaft
2000-2003 E53 BMW X5 4.4i X5 4.6is - for Rear Driveshaft
2007-2013 E70 BMW X5 3.0si X5 4.8i X5 xDrive30i X5 xDrive48i - for Rear Driveshaft 
1997-2002 Z3 BMW Z3 2.3 Z3 2.5i - Automatic Transmission 
1997-2002 Z3 BMW Z3 2.8 Z3 3.0i - Manual or Automatic Transmission 
2003-2008 Z4 BMW Z4 2.5i - Automatic or SMG Transmission
2003-2008 Z4 BMW Z4 3.0i Z4 3.0si 

Differential Rebuild Kit Plus by Team MFactory

Upgrade your BMW's differential with the Differential Rebuild Kit Plus by Team MFactory. Whether you've recently replaced your differential or upgraded to a Limited-Slip, it's essential to replace the hardware to ensure optimal performance. This comprehensive kit from ECS Tuning includes 10 Differential Ring Gear Bolts, new axle seals, and new differential bearings, providing everything you need for a complete differential rebuild. With high-quality components, you can trust this kit to support your new differential or rebuild your existing unit effectively.

• Comprehensive kit includes Differential Ring Gear Bolts, axle seals, and differential bearings
• Ensures optimal performance of your BMW's differential
• Perfect for differential replacement or upgrades to Limited-Slip
• High-quality components for reliability and durability
• Provides all necessary hardware for a complete rebuild

Gaining a prominent edge over the competition is now within reach, thanks to the MFactory Helical Limited Slip Differential offered by Turner Motorsport. This Helical LSD ensures a seamless and uniform distribution of power to your BMW's wheels, significantly enhancing traction whether you're on the street, strip, or track. It's an absolute necessity for BMW enthusiasts.

Curious about the LSD's role? Without it, your car essentially operates as a one-wheel-drive machine, delivering torque solely to the wheel with less grip. This is where the Helical LSD shines, as it allows both wheels to receive power by limiting the speed difference between them, in contrast to the open differentials found in most vehicles.

Key Features:

• 30-Day Feel the Torque™ Money Back Guarantee: An industry-first assurance that enables you to experience the difference. Furthermore, it comes with a Limited-Lifetime Warranty, offering peace of mind.
• Forged and Cryo-Tempered: Engineered to deliver exceptional durability and extended lifespan, ensuring it can withstand the rigors of even the most demanding challenges.
• Advanced Shot Peening Technology: Enhances surface hardness, making it well-equipped to handle the shocks experienced in competition-level drag racing.
• Maintenance-Free Gears: Bid farewell to the hassles associated with special fluids or rebuilds commonly required for plate LSDs. It's designed for a trouble-free ownership experience.
• Lock-Free Operation: Ensures there's no adverse impact on steering response, delivering a smooth driving experience.

Break-In Procedure: For optimal performance, it's recommended to change the fluid after the first 3-400 miles of use.

Please note that any defects or warranty claims should be directed to Team MFactory.

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:

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.