REC3922122 Aftermarket Cummins 6B/6BT/6BTA Exhaust Manifold | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket Cummins 6B/6BT/6BTA Exhaust Manifold - Part Number: REC3922122

A replacement cast-iron exhaust manifold for Cummins 6B, 6BT and 6BTA 5.9L marine diesel engines. It replaces Cummins 3922122 and later 4020066 / 4019951 service numbers where the same manifold arrangement is used.

⚙️ Key Features

• For Cummins B-Series 5.9L marine diesels

• Direct replacement for Cummins 3922122

• Related later Cummins numbers 4020066 and 4019951

• Heavy-duty marine exhaust-manifold casting

• Use new cylinder-head and turbo gaskets

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 4020066 / 4019951 → Later service references related to 3922122

OEM / Related Numbers:

• REC3922122

• Cummins 3922122

• Cummins 4020066

• Cummins 4019951

Aftermarket / Verified Equivalents:

• Recmar: REC3922122

🚤 Compatibility

Commonly used on:

• Cummins B-Series marine diesel exhaust systems

Typically suits:

• Engine models:

• Cummins 6B 5.9 marine

• Cummins 6BT 5.9 marine

• Cummins 6BTA 5.9 marine

• Engine Displacement: 5.9L

• Engine Type: inline six-cylinder marine diesel

🔌 Function

The manifold collects exhaust from all six cylinders and directs it to the turbocharger or marine exhaust outlet.

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