Small Block Chevy Valve Cover O-Ring Spacer

Originally designed to fix the problem with Pro Action heads and the square corners on the valve cover rail, unlike the rounded corners on all gaskets and valve covers you can buy. This part turned out to be one of our best sellers to all crowds and all types of small block Chevy's with the standard 4 bolt pattern.

This Spacer is a 3/8" thick with an O-ring groove in the top to seal against the valve cover and glues to the head with silicone on the bottom, transforming the valve cover rail of your head into a perfect O-ring groove. This immediately stopped our oil leaks and picked up the vacuum numbers tremendously. Fits Jeff Johnston valve covers for sure and most others with a flat bottom.

Combine with our SBC Valve Covers for a super light weight, leak free combination!