Gain a prominent advantage over the competition with the MFactory Helical Limited Slip Differential. Through the smooth and constant distribution of power to the wheels, the MFactory Helical LSD puts the power-to-the-ground and maximises your vehicle's traction. A must for any race car, be it Street, Strip or Track!

Diamond Cut to exacting tolerances from Forged High-Nickel-Chromium-Molybdenum Steel
Perfect fitment & finish ensures hassle-free installation & maintenance, each and every time

Designed using leading-edge Solidworks 3D CAD & Cosmos FEA software
Advanced Gear Geometry minimizes parasitic drivetrain losses. Race transmissions built with MFactory components transfer, on average, 1-2% more power to the ground over our competitors!

2nd Generation Design
The MFactory v2 Helical LSD is lighter, stronger and more efficient than any other Torque-Biasing Differential on the market today!

Covered by the MFactory Feel The Torque™ 30-Day Money Back Guarantee!
An Industry First! If you do not feel the difference after installing your new Limited Slip Differential, you may return the product to us for a full refund (excluding shipping costs) within 30 days of the purchase date

Covered by the MFactory Lifetime, Globally Transferable Warranty
Whether used on the Street, Strip or Track, all MFactory Helical LSD's come with a Lifetime, No-Hassle, Globally Transferable Warranty

No-Load/One-Wheel Syndrome
A common misconception is that a Torsen-Style Differential is useless under a no-load situation (e.g One wheel in the air). Although true to an extent, this no-load situation does not apply to the modern day car with Traction Control (or eDiff). For those without traction control, there is a very commonly used solution to the problem (used by professional race car drivers over the past 30+ years) that our competitors will not tell you; simply left-foot brake

Gear Ratio

E46 = 3.38 ratio

Specifications

• Made from imported Japanese SAE 4320 & 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 designed using industry-leading software puts more power to the ground

• Only the highest quality Brighton-Best Hardware is used

• Maintenance-free Gears eliminates the need for special fluids & rebuilds associated with plate-type LSDs

• Lock-free operation ensures no adverse affect to steering response

For Manual transmission models only

• BMW 1 Series E82 E87 E88 2004-2013 
• 125i, 128i & 130i (MT)
• 135i Sept 2007-2013 (AT)
• BMW 1 Series F20 F21 2012+
• 125i (MT) Requires Machining Service 
• BMW 2 Series F22 F23 2012+
• 228i (MT) Requires Machining Service
• M235i Requires Machining Service
• BMW  3 Series E90 E91 E92 E93 2004-2013
• 325i, 328i & 330i (AT/MT)
• 335i Sept 2007+ (AT)
• BMW 3 Series F30 F31 2012+
• 328i (MT) Requires Machining Service 
• BMW 4 Series F32 F33 F36 2012+
• 428i (MT) Requires Machining Service

Also fits: 

• BMW E46 325i/328i/330i 1998-2006 (AT/MT) with ratio 3.15 or greater
• BMW E8X Z4/2.2i/2.5i/3.0i 2002+ (AT/MT) with ratio 3.15 or greater
• BMW E8X 120i/128i/130i 2004-2013 (AT/MT) with ratio 3.15 or greater
• BMW E60 525i/540i 1996-2003 (AT)

To ensure the part(s) you have ordered fits your vehicle, we run a compatibility check prior to dispatch. We can do this either using your registration number or the last 7 digits of your VIN. Simply enter your car details prior to checkout.

MF-TRS-05E46A

Manufactured by

MFactory 

Warranty

Lifetime warranty