18-4491 - Cylinder Head Assembly 4.3L
18-4491 CYLINDER HEAD ASSEMBLY
Replaces: MerCruiser 938-827178 1 Replaces 4.3L Vortec V-6 (1996-Up) with screw in rocker arm studs (non-adjustable valve train), 8 intake manifold mounting bolts, center mount valve cover.
NOTE: Not for use with engines using factory roller rocker arms.
All cylinder heads are new castings and complete assemblies with new- stainless steel valves, hardened steel exhaust seats, valve springs, valve locks, and retainers. All GM cylinder heads utilize high performance screw-in rocker arm studs in place of factory press in rocker arm studs.
Sierra Marine Cyl Head Assy 4.3l Gm Vorte is equivalent to parts:
- 938827178 2 Mercury Marine
- 938827178 1 Mercury Marine
- 9-59002 Mallory Marine