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Each of our products is designed to incorporate new parts
1968-1976 Plymouth Valiant
and exhaust collector adapter for attaching the headers to a 2-1/2" exhaust system
The module kits include all the hardware to install into your existing fuel cell
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Manley 1.580 Diameter Valve Spring Cups - Spring O.D.: 1.580", Cup O.D.: 1.570", Cup I.D.: .635", Wall/Shlder Height: .140", Shlder Dia: .825" - (Set of 16) YA0836 Each of our products isManley Spring Cups offer superior performance and reliability and are the choice of many top engine builders. 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, our journey began with a
