Our billet G3 Hemi Valve Covers have been designed and made in the USA. They incorporate a number of features including an external contour that allows easier install/removal in car; stronger and significantly lighter than stock Hellcat covers (~10lbs less !); retained o-ring seals that stay put install after install; -12 AN ports on either end for ease of plumbing to an air/oil separator (catch can) as well as fill locations and they include seals, bolt kit and plug. They are available in natural AL and black anodized, with and without the Blackbird Performance logo.