Bikers Choice Hydraulic Lifter Update KT BLK Shovelhead Converts Shovelheads to Evolution style hydraulic lifters Compatible with any Panhead or Shovelhead cam Does not require Evolution cams Lifters have the proper .856 roller diameter with a big axle and full complement needle bearings, replacing the Evolution size roller (.994) which changes cam timing Kit has the following items: (2) billet aluminum polished or black tappets blocks, (4) hydraulic lifters with proper size rollers, (4) double adjuster pushrods