The Clutch Masters FX400 sprung-disc kit for 2006–2010 BMW 550i (E60) 4.8L raises holding capacity by about 170% while preserving more street-friendly behavior than rigid setups. It combines a heavy-duty pressure plate with a sprung ceramic disc to provide strong clamp, enhanced heat dissipation, and moderate dampening for high-torque situations. The kit is built for single-mass flywheel applications and is OEM-spec compatible.
Clutch Masters 06-10 BMW 550 4.8L E60 FX400 6-Puck Dampened Disc Clutch Kit