Product Description Specifications COMP's seat spacer for Big Block Chevrolet eliminate the need to stack .300" of shims under a spring. This .300" thick locator has a 1.732" OD for use with our 26120 Beehive spring. Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 4698-1 Proposition 65: Y Special Order: Y