COMP Cams Seat Spacer BB Chevy Exhaust .300" Thickness 935172 Approved for use by Knoxville

Approved for use by Knoxville Raceway and the WoO (World of Outlaws)

vehicles may have other interfering components that may require modifications or moving of existing brackets

For use with B&M Hi-Tek SuperCoolers

C4 1970-82

COMP Cams Seat Spacer BB Chevy Exhaust .300" Thickness 935172 Approved for use by KnoxvilleLate 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