Edelbrock part #4818 Waterneck is designed for use with Chevy 4.3L V6 & Chevy V8 engine applications. This polished water neck is a great way to finish off your engine. It features a 90 deg. adjustable neck and O-ring design for an improved seal, which also allows for removal without requiring a new gasket. Fits any 1-1/2" diameter outlet hose.