HGE9011 Aftermarket Mercruiser V8 Long Exhaust Manifold | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Mercruiser V8 Long Exhaust Manifold - Part Number: HGE9011

A long water-jacketed exhaust manifold for MerCruiser GM 454 CID / 7.4L and 502 CID / 8.2L big-block V8 engines. It is used on 330, 340 and 454 MAG exhaust systems with the matching elbow and riser components.

⚙️ Key Features

• Long big-block V8 manifold casting

• Water-jacketed marine exhaust design

• For GM 454 and 502 CID engine families

• Matches the HGE9011 manifold pattern

• Use new manifold and riser gaskets

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• HGE9011 (aftermarket big-block long-manifold reference)

• HGE9011MK is the related manifold kit

OEM / Related Numbers:

• HGE9011

• HGE9011MK

Aftermarket / Verified Equivalents:

• HGE: HGE9011

• HGE manifold kit: HGE9011MK

🚤 Compatibility

Commonly used on:

• MerCruiser GM big-block V8 wet-exhaust systems

Typically suits:

• Engine models:

• MerCruiser 330

• MerCruiser 340

• MerCruiser 454 MAG

• MerCruiser 7.4L / 454 CID

• MerCruiser 8.2L / 502 CID

• Engine Displacement: 454 CID / 7.4L and 502 CID / 8.2L

• Part Type: long water-jacketed exhaust manifold

🔌 Function

The manifold collects exhaust from one cylinder bank and transfers heat to the cooling water before the gas reaches the elbow.

Common signs of failure:

• External exhaust or cooling-water leakage

• Internal water leakage into the exhaust ports or cylinders

• Restricted cooling passages or abnormal manifold temperature

• Cracked casting, warped flange or corroded sealing face

• Loss of power caused by an internally restricted exhaust passage

📦 Condition

• Brand new aftermarket replacement part

• New and unused

• Supplied in manufacturer or equivalent protective packaging