Product Description Specifications Made from hardened steel, this locator uses an inboard locating shoulder to center the seat and hold the spring in place. The 4783 features a 1.540" OD and a .640" ID that works well with our 924, 925 and 939 dual valve springs. Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 4783-1 Proposition 65: Y Special Order: Y