With gear drive 509G (.509" lift) bolt-in camshafts. If you''re into a set of new gear driven performance cams; think about all the other components in in the cam chest there that you could upgrade; because upgradable they are! This S&S kit contains a set of standard or easy start cams; a precision tolerance replacement oil pump; cam support plate; performance hydraulic tappets and adjustable chromoly pushrods that can be fitted without disassembling the top-end. The effects? More consistent oil pressure and 99-06 models are upgraded to the 07-17 style oil pump. All cams are gear driven and provide optimized cam timing; higher lifts for better performance; improved reliability and reduced oil pump wear. All sets come with bolt-in cam shafts for ease of installation.