BMW ZF LSD Reinforced Billet steel cap

Factory differential caps can crack or fail when the LSD is configured with aggressive ramp angles such as 30°/30° or 30°/60°, or when the vehicle is subjected to high torque loads.

The RacingDiffs billet cap is engineered to withstand these conditions and maintain the structural integrity of the differential assembly.

• Billet tool steel construction – significantly stronger than factory cast components.
• Hardened and nitrated surface for improved durability and wear resistance.
• Prevents differential cap breakage during aggressive driving.
• Designed for motorsport use including drift, circuit racing and track applications.
• Lifetime warranty for long-term reliability.

Designed for BMW ZF clutch-type LSD units commonly found in:

• BMW E30
• BMW E36
• BMW E34
• BMW Z3

Compatible with BMW differential sizes:

• 168mm LSD
• 188mm LSD
• 210mm LSD

For 188mm differentials, the cap is designed to work with a 4-clutch pack configuration. A minimum of 3 clutch packs is required.

• Manufactured from premium tool steel
• Hardened and nitrated for superior strength and wear resistance
• Reinforced bolts included to prevent thread stripping
• Precision engineered for BMW ZF LSD units

• Drift cars
• Circuit racing vehicles
• Track day builds
• High horsepower BMW projects
• Rebuilt or modified LSD units

RacingDiffs specializes in performance differential components designed to improve durability, traction and reliability in demanding driving conditions.

Our reinforced billet differential cap is a proven upgrade used by enthusiasts and professional motorsport teams worldwide.