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An internal divider optimizes flow distribution to all ports of the manifold by reducing turbulence
Continued exposure to extreme heat generated from the engine block
2007-2009 GMC Yukon XL 2500
and 5/16-18 threads and work with 12-volt and 16-volt systems
Manley 1.625 Valve Spring Locators 91609159 An internal divider optimizes flowProduct Description: Valve Spring Locator Inside 0. 062 in Thick 1. 570 in OD 0. 567 in ID 0. 860 in Spring ID Steel Black Oxide Set of 16 Manley Performance high performance and racing engine parts have been powering winners since 1966. Since our inception in March 1966, Manley Performance Products has been at the forefront of the high performance automotive industry. Founded by gearhead Hank Manley shortly after his graduation from Brown University,