Moroso 68330 Moroso Chevrolet Small Block Spring Oiler Rails - Billet Aluminum - PairMoroso 68330 Moroso Chevrolet Small Block Spring Oiler Rails Billet Aluminum Pair Sandwiches between the cylinder head and stamped, cast, fabricated and billet SBC valve covers Fits: Small Block Chevy Billet aluminum rail sandwiches between the cylinder head and stamped, cast, fabricated and billet SBC valve covers The spring oilers have removable replaceable . 25" jets Each spring oiler has multiple oil supply ports that the supplied 4 AN male