Spec 07-10 BMW 335i/135i Stage 4 Clutch Kit *Requires SB53A-2 Flywheel*

This SPEC Stage 4 clutch kit includes the clutch disc, pressure plate, and release bearing. It's designed for the 2007-2010 BMW 335i and 135i models, offering a significant upgrade for those looking to handle more power or track their vehicle. This is a performance-oriented setup, so it's best suited for drivers who have modified their engine for increased horsepower and torque, or who frequently engage in demanding driving conditions like autocross or track days.

The Stage 4 designation means this clutch is built for serious performance. It features a sprung, multi-plate disc design that can handle substantial torque increases over stock. The pressure plate is engineered for a strong clamping force to ensure the clutch engages firmly and doesn't slip under load. Because this is a performance clutch, you can expect a firmer pedal feel compared to the factory unit, and engagement will be more abrupt. It's important to note that this kit requires the SPEC SB53A-2 flywheel, which is sold separately, to ensure proper function and compatibility. Proper break-in procedures, as recommended by SPEC, should be followed to ensure the longevity of the clutch system.

When installing this clutch kit, it's highly recommended to replace your rear main seal and pilot bearing at the same time, as these are often difficult to access once the transmission is back in place. Also, ensure your clutch fork and pivot ball are in good condition, as worn components can affect clutch operation and pedal feel. This kit is a robust option for BMW owners pushing their N54 or N55 engines beyond their original specifications.