Application Compatible with many Mercruiser stern drive V8 engines, fits for some V6 that came with the two piece manifold/elbow. Not work on V6 engines that came with the one piece manifold (use 807166A2 it has a flat tip), or early V8 with the round pin going through flapper. High Performance Specially designed to replace the damaged water shutter, helps keep water from entering the engine through the exhaust gas. Easy to install without complicated tools, directly replaces for OEM part number 807166A1 both in quality and functions. Powerful Functions .
eBay