Cylinder fits to piston; no machining required TC3 cam support plate and TC3 oil pump to ensure consistent oil pressure and engine longevity Includes an S&S 4" big-bore cylinder kit with 10.5:1 pistons, S&S 585 Easy Start cams, S&S Quickee Pushrods, and Premium Hydraulic tappets to make the most of the added displacement Made in the U.S.A. Not for use with S&S 79cc heads. Can be used with stock heads.. POWER PK CHN 99-06 BLK