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BMW Small Case Performance LSD Installation Kit

  • Blackline Helical LSD for BMW 168 Small Case Differentials
  • Improves Traction, Cornering Stability & Power Delivery
  • Maintenance-Free Helical Gear Design
  • High-Strength 8620 Alloy Steel Construction
  • Ideal for Fast Road, Track Day & Performance Driving Applications
  • Includes Motul Gear Oil & Drive shaft seals
Regular price £619.99
Sale price £619.99 Regular price £0.00

Please leave your VIN number & transmission type or part number from the diff casing sticker so we can confirm fitment

BMW Small Case Performance LSD Installation Kit

£619.99


Product Details

Upgrade your BMW's 168mm small case differential with this complete performance package, featuring a Blackline helical limited-slip differential and Motul high-performance racing gear oil. Designed for fast road, track day, and performance applications, this package significantly improves traction, stability, and power delivery compared to the factory open differential.

The Blackline helical LSD is engineered specifically for BMW models fitted with the 168mm small case differential. Using a precision torque-biasing helical gear design, it automatically transfers torque to the wheel with the greatest available grip, helping to reduce wheelspin and maximise traction during acceleration and cornering. Unlike clutch-type differentials, there are no clutch plates to wear out, resulting in smooth, progressive operation with minimal maintenance requirements.

With a 5:1 torque bias ratio, the Blackline LSD can transfer up to five times more torque to the wheel with the most traction, improving vehicle control and confidence in both dry and low-grip conditions. Manufactured from high-strength 8620 alloy steel and precision heat-treated for durability, it is built to handle the demands of high-performance road and motorsport use.

To complement the differential, this package includes Motul high-performance racing gear oil, specially formulated for limited-slip differentials and high-load drivetrain applications. Designed to withstand extreme temperatures, shock loads, and heavy torque demands, it provides exceptional lubrication and protection while ensuring smooth and consistent differential operation.

Key benefits include:

  • Improved traction and acceleration
  • Reduced inside wheel spin when cornering
  • Enhanced vehicle stability and control
  • Smooth, progressive torque transfer
  • No clutch plates to wear or service
  • Quiet operation suitable for road and track use
  • Premium Motul racing gear oil included
  • Outstanding protection against heat, wear, and extreme loads

Designed specifically for BMW 168mm small case differential applications, this package provides a complete solution for enthusiasts looking to improve both performance and reliability.

Vehicle Fitment

Small case 8 bolt crown wheel differential

• 1 Series E81 118i manual
• 1 Series E82 120i auto
• 1 Series E87 116i; 118d; 120d manual
• 1 Series E87 120i auto & manual
• 3 Series E46 316i; 316ti
• 3 Series E46 318i; 318ti; 318ci manual
• 3 Series E46 320i auto & manual
• 3 Series E90 320i auto & manual
• 3 Series E90 320si manual
• 3 Series E21 315; 316; 318; 320i
• 3 Series E21 323i (without OE LSD)
• 3 Series E30 318i; 318is
• 3 Series E36 316i; 318ti; 318is; 320i
• Z3 E36 1.9/2.0
• X5 E53 4.4i auto (front axle)
• X5 E53 4.6is (front axle)
• X3 E83 3.0d; 3.0sd (front axle)

Specifications

  • The LSD is a straight swap for the standard unit, you will only need to replace 2 diff bearings (if the originals cannot be re-used)
  • This is a torque-biasing helical gear limited slip differential - not a plate type, viscous coupling or clutch pack differential (it does not lock)
  • Oil API Standards: API GL-4, API GL-5, MIL-L 2105 D
  • Oil Viscosity: 75W-90

What's Included

  • 1x Blackline limited-slip differential
  • 2x Drive shaft seals
  • Motul Gear 300 75W-90
  • Bearings not included
  • Fitment verification using your VIN before dispatch