NEW!! XRP Full Swivel Water Necks for Chevrolet motors in -16 AN, -20 AN, 1-1/4″ hose and 1-1/2″ hose sizes. These are all made from true 2014-T6 aircraft aluminum forgings and a 6061-T6 base plate. Made here in the USA, flow ported and black type III hard anodized with the XRP logo on one side