Street performance cams (pair) for all twin cam engines. These cams make great midrange power from 2800rpm up to 6500rpm. These are brand new steel billet cams, not regrinds. Exhaust cams have a gear for the distributor drive. While these cams can be used in an otherwise stock engine, best results are obtained when used with free flow exhaust, higher compression and performance carburetion 285 duration, 385 lift Cam Shield assembly grease is included.