Cylinder Head Pro Port GM Gen III/IV LS3 V8 LSX block
Victor Jr. LS3-LSX Pro-Port Cylinder Head
Works with GM LSX Blocks
Don't get bogged down by the limitations of porting stock GM heads. No more extremely large port and thin walled cylinder heads. These Pro-Port Victor Jr. LS3-LSX heads are designed with undersized ports and omitted combustion chambers to give head porters more flexibility in port design while retaining a more robust architecture. All machining except the exhaust flange and spring pockets, matches stock GM LS3/L76/L92 cylinder heads. This includes valve location and angle, Intake flange, and accessory bolts on the ends of the heads. Valve seats and valve guides are included.