RD4066
The Ultimate Performance Upgrade — with Lifetime Warranty
All RacingDiffs clutch plates are track-proven across Europe—circuit, hill climb, rally, and drifting. We manufacture both LSD friction plates and dog-ear steel plates from premium, thermally processed tool steel. In the final production stage, plates receive our Molybdenum-Ceramic coating to optimize friction vs. durability, minimizing wear and warping under extreme heat.
Direct replacement for factory clutch packs—no machining or mods when the differential is within spec.
Not for open diffs, Torsen/helical units, or locker axles.
What’s inside
Recommended oil: Ravenol Racing 75W-140 (or equivalent high-performance LSD oil).
Warranty: Covered by the RacingDiffs Lifetime Warranty against manufacturing defects.
OEM cross-references (for identification)
Steel/separator plate: 41361-22010