COMP Cams Seat Spacer BB Chevy Exhaust .300" Thickness 935172 70-73 Camaro/Firebird

70-73 Camaro/Firebird

C4 1970-82

the Sparco Tour is perfect for professional or weekend racers

3/1Rating (SFI-1)

when you need an elevated idle

COMP Cams Seat Spacer BB Chevy Exhaust .300" Thickness 935172 70-73 Camaro/FirebirdLate model Big Block Chevrolet engines are originally equipped with exhaust valve rotators. Until now, the only way to make up for the rotator was to stack . 300" of shims under the spring. This was sloppy but also did not fit as well as these seat spacers. These will locate the spring with an outside step so the spring cannot "walk" around on the head. Avoid stacking . 300" of shims under the valve springs on your Big Block Chevrolet with our seat