Product Description Specifications Constructed from hardened steel alloy, COMP's locator cups handle high RPM and extreme spring pressures while holding the spring. Our 4769 features a 1.635" OD with a .640" ID that works with our 901, 26956, 26957, and 26955 springs. Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 4769-16 Proposition 65: Y Special Order: Y