manley valve spring locator, outside, heat-treated, fits 1.740 in. od. spring, .635 in. id., 1.610 in. od., .062 in. thick, black, set of 16

Manley valve spring cups and locators protect your expensive aluminum heads from being galled by your high-pressure valve springs. They are quality-machined to a .062 in. or .035 in. thickness from heat-treated steel with a corrosion-resistant black oxide finish. Manley valve spring cups and locators are available in inside diameter (spring locator) or outside diameter (spring cup) styles.