This finned differential cover increases oil capacity and greatly improves cooling for the differential (ever notice that all real race cars have coolers for the diff oil?) This cover is very useful for race and track cars – cooler running reduces stress on the differential and promotes longevity of the limited slip. These covers fit all models with 6 cylinder diff (188mm ring gear) – include 325e, 325i/is, M3 and Z3’s with 6 cylinder engine. You must reuse your existing drain and fill plugs.
Sometimes a longer lead time in necessary on this diff cover due to fluctuating availability.