Summary: flywheel Increasing the disc diameter to 240mm over the stock diameter of just 228mm and reducing the combined rotational mass of the flywheel disc and pressure plate increases performance ECS Tuning RA4 Clutch Kits ECS Stage I RA4 clutch kit does NOT include a RS4 clutch but rather an OE S4 clutch pressure plate ECS has put together this clutch kit for customers looking to
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