INTERNAL ENGINE COMPONENTS
Cylinder Head Assemblies
CYLINDER HEAD ASSEMBLIES
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.
b
b
18-4485
18-4484
CYLINDER HEAD ASSEMBLY
CYLINDER HEAD ASSEMBLY
Replaces: MerCruiser 938-883490 1
Fits: 5.7L V-8 GM (1969-86) with press in rocker arm studs with 12 intake
Fits: 5.7L V-8 GM (1987-95) with press in rocker arm studs with 12 intake manifold
manifold mounting bolts, perimeter mount valve cover
mounting bolts- (4 inside intake manifold bolts at 23 degrees), center mount valve covers
b
b
18-4486
18-4489
CYLINDER HEAD ASSEMBLY
CYLINDER HEAD ASSEMBLY
Replaces: MerCruiser 938-883297 1,938-803860T
Replaces: MerCruiser 936-5544, 936-810840/986767
Fits: 5.7L V-8 GM Vortec (1996-Up) with press in rocker arm studs with 8 intake
Fits: 2.5L/3.0L GM (1968-95) (non MerCruiser LX models) (1968-95)
manifold mounting bolts, composite valve cover
b
b
18-4491
18-4490
CYLINDER HEAD ASSEMBLY
CYLINDER HEAD ASSEMBLY (REMANUFACTURED)
Replaces: MerCruiser 938-827178 1, 938-824147
Replaces: MerCruiser 938-883296 1, 938-884740, 938-9427
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
Fits: 4.3L V-6 GM (1985-96) with press in rocker arm studs, 12 intake manifold
engines using factory roller rocker arms.
mounting bolts, center mount valve cover
b
b
18-4495
18-4496
CYLINDER HEAD ASSEMBLY
CYLINDER HEAD ASSEMBLY
Replaces: MerCruiser 949-4057,949-5798,
MerCruiser 949-5913,949-6560,
OMC 986086,988163,3854339, Volvo 3854339,3853894
OMC 986085,987970,3858868, Volvo 3854214,3858867
Fits: (1980& Up) 5.0L Ford with D-shape 58 cc combustion chamber
Fits: (1980& Up) 5.8L Ford with D-shape 58 cc combustion chamber
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