Make sure to check all new fittings, bolts, and hoses upon first startup. Also check to make sure there are no coolant leaks and also oil leaks from the new hoses or from the side cover where you install the new driveshaft end. Ensure that the supercharger belt is running true and re-check locking nut for belt, tension of belt and also set screws after first ride. It takes about 5 minutes to go over all these once its all put together.