These are highly accurate reproductions of the steel valve covers used on the original 1965 Shelby GT 350 R-Model race cars as well as the 1967 Mustang group 2 Trans Am race cars. Equipped with breather tubes that are positioned towards the front of the engine; fit all 260-289-302 and 351 Windsor engines. (For use with roller rocker arms, they require spacers which are sold separately.) Supplied in bare steel.