Edelbrock Cylinder Head Pro Port Victor Lsr Gen 3-4 (Ls Series) HipPedThe Edelbrock 770469 Small Block Chevy LSR Pro Port Cylinder head is designed specifically for the professional cylinder head porter and engine builder. Like the other Edelbrock Cylinder head, The Pro Port cylinder head is also cast in the USA at the state of the art Edelbrock Foundry with extra thick walls to allow for custom CNC porting. In most cases, seats and manganese bronze valve guides are included, but not installed. Please note: This head