All the power in the world does no good if it cant get to the ground. The key link to getting the power to the ground besides the tires is the clutch you choose. Weve found what works for different applications. You you can follow these recommendations with confidence. The 17-3511 is for high RPM use safe above 6000 RPM sustained, yields longer life. Use with standard disc and throw-out bearing. Heavy-duty street cover only, as used in some Ferrari applications.