MFactory Helical Limited Slip Differential for BMW E39, E46, E85, E86, E89, E81, E82, E87, E88, E90, E91, E92, E93
Unlock serious traction, faster corner exits and confident acceleration with the MFactory Helical Limited Slip Differential. This BMW LSD upgrade transforms how your car puts power to the ground. Smooth, silent and incredibly strong, the MFactory helical LSD delivers constant torque to the wheel with grip, reducing wheelspin and maximising drive on road, strip and track.
Ideal for fast road, drag racing and track day BMW builds, this gear-type helical limited slip differential is a proven upgrade for popular models including BMW 120d, 123d, 320d, 325i, 328i, 330i, 520d, 525i, 530i, 535i and Z4 2.2i, 2.5i, 3.0i. If you are searching for BMW E39 LSD, BMW E46 LSD, BMW E85 Z4 LSD, BMW E90 LSD or BMW E92 LSD, this MFactory BMW LSD upgrade is the high-performance differential you want.
Why choose the MFactory Helical LSD
- Maximises traction and puts more power to the ground under hard acceleration
- Smoother power delivery vs plate-type diffs, with no chatter and no special fluids needed
- Lock-free operation helps maintain crisp steering response and daily drivability
- Built to handle serious torque and shock loads for motorsport and performance use
- Maintenance-free helical gears - no clutches to wear, no routine rebuilds associated with plate-type LSDs
Key features
- Made from imported Japanese SAE 4320 and SAE 9310 steel
- Forged, double tempered and super sub-zero treated for unsurpassed toughness
- Advanced shot peening technology increases surface hardness
- Designed to withstand the extreme shock loads of competition-level drag racing
- Advanced gear geometry, developed using industry-leading software, puts more power to the ground
- Only the highest quality Brighton-Best hardware is used
- Maintenance-free gears eliminate the need for special fluids and rebuilds associated with plate-type LSDs
- Lock-free operation ensures no adverse effect on steering response
- Optional Race Pack upgrades available for more aggressive cornering - Honda and Mazda fitments only
Real-world results from Nforcd
We have fitted and driven MFactory helical LSDs on multiple customer BMW builds and the feedback has been consistently excellent. Drivers report a clear reduction in wheelspin, stronger corner exit drive and stable, predictable behaviour in both wet and dry conditions. If you want a robust BMW limited slip differential that works on the street and excels on circuit, this is the one we recommend.
Vehicle compatibility
1 Series
- E81, E82, E87, E88 120d and 123d 2004 to 2013 - manual and automatic - final drive ratio less than or equal to 3.07
3 Series
- E46 325i, 328i and 330i 1998 to 2006 - manual and automatic - final drive ratio less than or equal to 3.07
- E90, E91, E92, E93 320d 2004 to 2013 - manual and automatic - final drive ratio less than or equal to 3.07
5 Series
- E39 520d, 525i, 530i and 535i 1995 to 2003 - manual transmission
Z Series
- E85, E86, E89 Z4 2.2i, Z4 2.5i and Z4 3.0i 2002 onwards - manual and automatic - final drive ratio less than or equal to 3.07
If you are unsure about final drive ratio or fitment, contact us and we will confirm before dispatch.
Compatibility check
We run a fitment check before shipping to ensure the part suits your car. Provide your UK registration number or the last 7 digits of your VIN at checkout so we can verify compatibility.
Professional fitting available
For installation, we recommend professional fitting at Nforcd in Warwickshire. Request a fitted price and lead time by emailing Sales@nforcd.com. We can supply, install and road test your BMW LSD upgrade for complete peace of mind.
Part number
MF-TRS-05E46
Manufactured by
MFactory
Warranty
Lifetime warranty
Image for illustration only. Actual product may differ slightly depending on application.
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