The Clutch Masters 14-18 BMW F80 M3/F82 M4 S55 Factory Fit FX350 Twin Disc Clutch Kit w/Alum. Flywheel is a performance-grade clutch kit designed to provide superior performance and reliability to your BMW F80 M3/F82 M4 S55. This kit includes a lightweight aluminum flywheel, twin-disc clutch, and pressure plate for maximum power transfer and durability. The FX350 kit is designed for those who demand the highest level of performance and reliability from their BMW. This kit provides an increased clamping load, improved torque capacity, and a more aggressive pedal feel. This kit is ideal for those looking to get the most out of their BMW and is perfect for track days, drag racing, and spirited driving.