This ACT Clutch disc Xtreme Race Discs are available in two different designs, to insure the best for you BMW vehicle. There is the 4 or 6-puck, and these hub designs that are highly durable and resistant to heat.

The components clutch 4-puck Xtreme Discs engage harsher, shift faster, and are well suited for the smaller disc sizes from smaller engines.

This 4-puck components clutch disc is available in both Sprung and Solid Hubs. See which components clutch has the race disc right for you.

The components clutch 4-Puck Sprung Hub Race Disc (G4) is recommended for road racing. It has the increased torque capacity and spline life, and it has the best durability. This components clutch is a very quiet operation and reduced the driveline shock and not to mention the very harsh engagement and chatter.

The components clutch 4-Puck Solid Hub Race Disc (R4) is recommended for drag and road racing - note: Not for the Street. It has the increased torque capacity, and with this clutch disc you can enjoy the fastest shifts and low inertia for your BMW vehicle. With this clutch disc, you will get the best durability but shortened spline life and also the harsh engagement and chatter