Valve train kit for Twin Cam. Use with cams up to .600 lift. Includes race master stainless steel valves that are OE style triple keeper grooved, steel top valve spring collars and high temperature viton valve guide seals. Springs are single conical ovate wire. Does not require cylinder head machining for installation. Fits Twin Cam 2005-later with installed spring height of 1.800 inches creating valve seat pressure of 150 pounds.