GM Valve Cap, Accumulator Dehydrator, 7/16-20 Thread, NOS 6551640

NOS, or New Old Stock does not mean the part is mint or even perfect! Ford, GM and Chrysler have always been in the business of building mass produced vehicles and parts, NOT show cars. When we describe something as being NOS that means it is new and has never been installed on a car. Any out of the normal flaws are mentioned and most times even pictured in the description so there should be no surprises.