Edelbrock GM LS3 Engines E-Street 15-Degree Cylinder Heads w/ .570in Lift - Inconel Valves

Edelbrock 77621 E-Street 15-Degree Cylinder Heads are designed for GM LS3 engines. Sold in pairs, these premium quality, bolt-on-ready heads feature 69cc combustion chambers and Beehive valve springs, allowing up to .570" lift camshafts. They come assembled with COMP Cams valve train components, including chromoly steel retainers, heavy-duty stainless-steel & Inconel valves, and premium valve seals. Manufactured from high-grade aluminum alloy with manganese bronze valve guides for extended durability. Features patented Clean Cast Technology for improved air/coolant flow and a dual spark-plug-pocket design for both tapered-seat and gasket-seat spark plugs.