The Edelbrock Pro-Port LSR cylinder head for Gen III/IV small-block Chevy is a raw, unported race casting intended for professional CNC porting. Cast in the USA with extra-thick walls, it accommodates almost any CNC port shape and size. Seats and manganese-bronze valve guides may be included but are not installed—professional head preparation is required before use.
Edelbrock Cylinder Head Pro Port Victor Lsr Gen 3-4 (Ls Series) HipPed