Assembled; Small Block Chevy 350 TPI/ Intake Bolt Pattern 90 Degree Angle On All Bolts; Natural Aluminum; 165 CC Intake Port; 65 CC Exhaust Port; 60 CC Chamber Volume; 2.02 Inch Intake Valve; 1.60 Inch Exhaust Valve; 1.46 Inch Spring Diameter; Single; With Pushrod Guides; Rocker Studs