• Utilizes the Gen IV LS7 valve-train and intake manifold. • Designed for any new Gen IV short-block with 4.125" bore or larger. • Uses a 2.200" intake valve and 1.600" exhaust valve • Has a 280cc intake port • Has a deck thickness of .750" • Has a 70cc Combustion Chamber Standard
Each Mast Black Label cylinder head assembly includes:
• A fully CNC machined Mast Black Label aluminum cylinder head • Mast nitrided & micro finished .700" Lift Dual Springs • Mast lightweight stainless steel intake & exhaust valves • Mast lightweight steel retainers • Mast machined locks • • NOTE: Gaskets, valve covers, rocker arms and pushrods not included