GM 5.7L Vortec Cylinder Head Assembly | Sierra 18-4486HP
Completely assembled new marine cylinder head assembly fits GM 350 cu. in. marine engines with 8 intake manifold mounting bolts
- Fits 5.7L GM V8 Vortec engines from 1996 and up with press in rocker arm studs with 8 intake manifold mounting bolts
- Uses composite valve cover
- Complete new casting assembly with new stainless steel valves, hardened exhaust seats, valve springs, rocker arms, and retainers
- Sold individually - 2 required per engine
- Replaces Mercury 938-883297 1, 938-803860T, 938-883297R1
