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this is it
The CID LS BA intake manifold is designed for 850+HP street
The port opening on the manifold is not as tall as a factory LS3 port
4500 Carb bolt pattern
SC2 - GV2 4500 9
CHE Bronze Alloy Exhaust Only Valve Seat Upgrade Chamber Softening this is itUpgrade 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.