505/515 Bolt-in REAPER cams for XLs producing a wide power band in stock engines, a great way to take a Sporty to a hot new level of performance. Split lift camshaft with .505 lift on the intake and .515 lift on the exhaust produce a solid power band with top fuel sound. Can be used with stock pushrods and valve-springs, FEULING recommends matching new camshafts with new lifters but not required.