BMW M3, M5, M6, Z4M LSD Clutch pack + Free play delete – Basic pack

BMW M3, M5, M6, Z4M LSD Clutch pack + Free play delete – Basic pack, RacingDiffs part no. RD4021, RD4025. The kit replaces the friction and steel plates of the factory limited slip differential with RacingDiffs plates made from heat-treated tool steel with a molybdenum-ceramic coating.

Key Features

• Direct OEM Replacement: Installs in place of the factory clutches with no machining, no grinding, and no special modifications.
• M-Clunk Elimination: Upgraded friction discs restore proper internal tension and reduce or eliminate the common “clunk” noise during gear transitions.
• Enhanced Locking Performance: Provides higher and more stable lock than worn OEM clutches — ideal for spirited and track driving.
• Protects Your Viscous Coupler: Reduces stress and prevents premature failure by offering consistent LSD performance under load.
• Premium Molybdenum-Ceramic Coating: Motorsport-grade friction layer designed for heat resistance, smooth engagement, and long lifespan.
• Complete Video Support: Step-by-step installation tutorials available in the RacingDiffs Video Gallery.

Fitment

• BMW M3 (E46, E36 Motorsport LSD retrofits)
• BMW M5
• BMW M6
• BMW Z4M

Versions

Specifications