Edelbrock part 4817 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 45 deg. neck and O - ring design for an improved seal, which also allows for removal without requiring a new gasket. Fits any 1 - 12 diameter outlet hose.