Edelbrock 607119 Performer RPM Chevrolet small block angled plug aluminum cylinder heads. Show polished finish for show car detailing. Heads are completely assembled and includes valves, threaded rocker studs, pushrod guide plates, valve springs, retainers and locks. Chamber size is 70cc 185cc intake ports 65cc exhaust ports 2.02" intake valves 1.60" exhaust valves pushrod diameter is 5/16" rocker stud diameter is 3/8" valve spring diameter is 1.46" maximum valve lift is .575" deck thickness if 9/16" angled plugs Ports are in the stock locations for compatibility with standard manifolds and headers. CNC port matched intake and exhaust ports for optimum flow and maximum power. D-shaped exhaust ports provide increased flow for more power. Cast in Edelbrock's foundry and machined and assembled at Edelbrock's manufacturing facility in the USA. NOTE: To use stock rocker arms, .100" longer than stock pushrods are required. We recommend Edelbrock 9629 pushrods which we stock. We reommend that the heads not be used on engines with less than 4.0" bore unless using a cam having less than .450" lift. Sold As 2 Cylinder Heads Edelbrock 607119 Performer RPM Chevrolet small block cylinder heads angle plugs 70cc 607119 These are the cylinder head bolts required for the small block Chevy Edelbrock aluminum cylinder heads above. We offer the entire line of Edelbrock aluminum cylinder heads for Chevrolet small block engine. Check them out! We welcome CANADIAN customers! For ordering information, click on "Orders To Canada" at the top left side of this page. PAYMENT METHODS: PayPal, Visa, Mastercard, Discover, American Express, money orders.