Sierra 18-449 Boat Cylinder Head Fits 2.5L/3.0L GM (1968-95),non-Mercruiser LX Models 1968-95. Condition is "Brand New".

Condition is Brand New.

Brand: Sierra

Model: 18-4489

Shipped with USPS Priority Mail Or UPS Ground Either At Sellers Option .

You Will Receive 1 ea Model: 18-4489 Sierra cylinder boat head assembly for Mercury Marine boat engine.

RARE VINTAGE COLLECTIBLE

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Inventory Box Number: 3 Bay Warehouse Door #1

Additional Information;

Features

Sierra cylinder head assembly for Mercury Marine engine. Fits 2.5L/3.0L GM (1968-95), non-Mercruiser LX models (1968-95). Sierra Part #18-4489.

OEM Part Numbers:

936-986767

936-5544

936-810840

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Sierra Part #18-4489

Cylinder head assembly

For Mercury Marine engine

Replaces 2.5L/3.0L I4 GM 1968-95 (non MerCruiser LX models) 1968-95

Brand:Sierra Marine

Manufacturer's Part Number:18-4489

Part Type:Cylinder Heads

Summit Racing Part Number:RRA-18-4489

UPC: 808282228781

Key Features:

New stainless steel valves, hardened steel exhaust seats, valve springs, valve locks and retainers

GM cyl. heads utilize high performance screw-in rocker arm studs in place of factory press studs

Fits: 2.5L/3.0L GM (1968-95)

Cross References

Mercruiser Stern Drive 936-5544

Mercruiser Stern Drive 936-810840

Mercruiser Stern Drive 936-809890

Mercruiser Stern Drive 938-8M0115134

Mercruiser Stern Drive 938-8M0115135

Mallory 9-59000

Fitment Information

Mercruiser

120 GM 1983-1986 120hp 4 stroke 2.5 liters 4 cylinders 153 cid

140 GM 181 I/L4 1968-1986 4 stroke 3, liters 4 cylinders 181, cid

2.5L GM 1983-1989 120hp 4 stroke 2.5 liters 4 cylinders 153 cid

3.0L GM 1983-1995 140,hp 4 stroke 3 liters 4 cylinders 181 cid

3.0LX GM 1990-1995 4 stroke 3 liters 4 cylinders 181 cid

Description

Sierra Cylinder Head Assembly for 2.5/3.0L (1968 - 95)

Fits: 2.5L & 3.0L GM (1968-95) (non MerCruiser LX models) (1968-95) NON-VORTEC

Features:

Hardened Steel Exhaust Seats

Threaded Rocker Studs

Assembled with Stainless Steel Valves, seals and springs

Casting Numbers: 954, 748, 950, 758, 087, 852, 531

Note: Engines made between 1968-1982 use manifold to head gasket BARCHV-47-0120, Engines made between 1983-1995 use manifold to head gasket 18-1204

Details

Brand: Sierra

Manufacturer Item Number: 18-4489

Engine Make: Mercruiser

SIERRA 18-4489 CYLINDER HEADS

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.

Replaces: MerCruiser 936-5544, 936-810840/986767

Fits: 2.5L/3.0L GM (1968-95) (non MerCruiser LX models) (1968-95)

Cylinder Head Assembly 18-4489

Marine cylinder head assembly for GM 2.5L and 3.0L non-LX model 4 cylinder engines.

For 2.5L 153 CID & 3.0L 181 CID non-LX model engines from 1968-95

Replaces Mercruiser 936-5544 and 936-810840/986767