CHE Bronze Alloy Exhaust Only Valve Seat Upgrade Chamber Softening These are our bigger intake

These are our bigger intake port offerings and are best suited to engines running aftermarket plastic factory-style intakes

125" Bore - 45CC Chambers

An upper fuel injector location can be selected as an option

The port opening on the manifold is not as tall as a factory LS3 port

SC2 - GV2 4500 9

CHE Bronze Alloy Exhaust Only Valve Seat Upgrade Chamber Softening These are our bigger intakeUpgrade any of our cylinder heads to CHE BX Bronze Alloy Valve seat material. All standard finished cylinder head pricing comes with CHE Ductile Iron Valve Seats. Upgrading to CHE Bronze Alloys Valve Seats may be desirable in some applications. CHEs proprietary Blended Bronze Alloys have been developed specifically with valve seats in mind. They have extraordinary wear resistance and greater thermal properties than all other bronze alloys tested.