This Billet Adapter Plate from Bull Boost is 100% USA Made. These High Quality adapters feature AN -10 O ring fittings . Each adapter is Black Anodized and also features a 1/8NPT pressure port for guage sensors or oil feed lines to Turbochargers and Superchargers  * Fits ALL 4.6 and 5.4 Cast Iron and Alloy Blocks * INCLUDES -10AN OIL FITTINGS * INCLUDES Block to Adapter O RING GASKETS * Includes AN Fitting O rings