Product Description Specifications COMP's seat spacers for Big Block Chevrolet eliminate the need to stack .300" of shims under a spring. These .300" thick locators have a 1.732" OD for use with our 26120 Beehive springs. Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 4698-8 Proposition 65: Y Special Order: Y