Assembled; Ford Small Block Engine; Aluminum; Angled Plug; Rectangular 190 CC Intake Port/ Square 65 CC Exhaust Port; 60 CC Chamber Volume; 2.02 Inch Intake Valve/ 1.6 Inch Exhaust Valve; 1.437 Inch Outside Spring Diameter; Single; With Dual Valve Springs/ Damper Spring/ Retainers/ Locks/ Guide Plates/ Rocker Arm Studs/ Valve Stem Seals/ Valve Guides/ Valve Seats