HVH Super Sucker Plastic Carburetor Spacer - 1 in Thick - 4 Hole - Square Bore R1-LONGRANGE-UPGRADE This adapter features precision die-cast

This adapter features precision die-cast aluminum construction and includes a premium block gasket

688 in Oval Port

NEW Deluxe Head Pad

It also includes a combustion chamber sealing plate and instructions on how to cc cylinder heads

HVH Super Sucker Plastic Carburetor Spacer - 1 in Thick - 4 Hole - Square Bore R1-LONGRANGE-UPGRADE This adapter features precision die-castProduct Description: Carburetor Spacer Super Sucker 1 in Thick 4 Hole Square Bore Plastic Black HVH High Velocity Heads has been porting high performance cylinder heads and intake manifolds since 1970. HVH has over thirty years of head porting, head design, intake porting and intake design along with carburetor spacer design experience. Originally HVHV only worked for NASCAR Winston Cup teams, doing their cylinder heads and manifolds. From 1980 to