MFactory Competition Products

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!
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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!

Multiple Stages Available (Honda & Mazda)
Users can choose (and upgrade) between the various Stages available, which determine the Bias Ratios. With the MFactory Helical LSD, upto 75% torque can be transferred to the one wheel! A must-have for serious road-racers

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

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
  • Optional Race Pack Upgrades for more aggressive cornering (Honda & Mazda Fitments Only)
Product Images
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Fitment Notes
Honda B16A2 Fitments: Will not directly fit models previously equipped with an OEM Viscous LSD, and will require a Ring Gear change

Honda B16A/B18C/K20A Stage 2: These are specifically designed to be used with the DSS Pro Level 28 Spline Axles. They will NOT work with oem axles

BMW 135i MT/335i 07+ MT/DCT/335d Fitments: Will not directly fit these models due to the oem Ring Gear being welded onto the differential. The Ring Gear will either need to be machined to accept the new LSD, or a new bolted Ring & Pinion used. MFactory Competition Products is one of only 3 companies in the US that can provide this service that meets oem tolerances, and the only US company to manufacture precision aftermarket performance Ring & Pinions (Final Drive Gears) for the BMW
Warranty
MFactory Competition Products will provide a limited lifetime warranty for all Helical LSD's to be free of defects in materials and workmanship upon receipt of product and professional installation. Parts returned must be determined by MFactory Competition Products to be defective before any warranty credit or replacement is issued

MFactory Competition Products's obligation under warranty shall be limited to repairing or replacing, at its option, any part proven defective. The customer must prepay transportation charges

Final determination of the suitability of the products for the use contemplated by the buyer is the sole responsibility of the buyer. MFactory Competition Products shall not be liable for any special, direct, indirect, incidental, or consequential damages, that might be claimed as a result of the failure of any part, including claims for delay, loss of profits, or labor

MFactory Competition Products shall not be liable for any damage or injury to persons or property resulting from improper installation or misuse of any part subject to this warranty

There are no other warranties expressed or implied extending beyond those set forth above

INSTALLATION: Any warranty claims arising as a result of the failure of a Helical LSD will ONLY be entertained if the LSD was professionally installed and was NOT disassembled. Disassembling a Helical LSD will invalidate the warranty.

RECOMMENDED BEARINGS: When ordering your MFactory Helical LSD, we highly recommend that you order new Diff Bearings at the same time. All of the bearings that we supply are high quality OEM Japanese/German Bearings.
523i/530i 1995-2003 (AT) Helical LSD

Part No.: MF-TRS-05E46A
Fitment: BMW E39
Stock:
MSRP: US$999.95
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325i/328i/330i 1998-2006 (AT/MT) Helical LSD. For Final Ratio >= 3.15

Part No.: MF-TRS-05E46A
Fitment: BMW E46
Stock:
MSRP: US$999.95
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525i/528i/530i/535i 2003-2010 (AT) Helical LSD. For Final Ratio >= 3.15

Part No.: MF-TRS-05E46A
Fitment: BMW E60
Stock:
MSRP: US$999.95
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Z4 2.2i/2.5i/3.0i 2002+ (AT/MT) Helical LSD. For Final Ratio >= 3.15

Part No.: MF-TRS-05E46A
Fitment: BMW E8X Z4
Stock:
MSRP: US$999.95
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128i/130i 2004-2013 (AT/MT) Helical LSD. For Final Ratio >= 3.15

Part No.: MF-TRS-05E46A
Fitment: BMW E8X
Stock:
MSRP: US$999.95
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135i 2007-2013 (AT) Helical LSD. For Final Ratio >= 3.15

Part No.: MF-TRS-05E46A
Fitment: BMW E8X
Stock:
MSRP: US$999.95
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325i/328i/330i 2004-2013 (AT/MT) / 335i Sep 2007+ (AT) Helical LSD. For Final Ratio >= 3.15

Part No.: MF-TRS-05E46A
Fitment: BMW E9X
Stock:
MSRP: US$999.95
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125i/228i 2012+ (AT/MT) / M135i/M235i 2012+ (AT) Helical LSD. For Final Ratio >= 3.15

Part No.: MF-TRS-05E46A
Fitment: BMW F2X
Stock:
MSRP: US$999.95
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328i/428i 2012+ (AT/MT) / 335i/435i 2012+ (AT) Helical LSD. For Final Ratio >= 3.15

Part No.: MF-TRS-05E46A
Fitment: BMW F3X
Stock:
MSRP: US$999.95
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