21356421 Exhaust Manifold | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta Standard-Height Starboard Catalyst Exhaust Manifold - Part Number: 21356421

Genuine standard-height starboard-hand exhaust manifold for selected Volvo Penta GM-based 5.0-litre and 5.7-litre catalyst-equipped V8 petrol marine engines. The water-jacketed manifold carries exhaust gas to the catalyst elbow while cooling the casting to marine operating temperature.

⚙️ Key Features

• Standard-height starboard-hand manifold

• Catalyst-equipped V8 petrol-engine application

• Water-jacketed marine exhaust construction

• Integrated oxygen-sensor and catalyst-system compatibility

• Zinc anode 21403633 available for corrosion protection

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21356421 - Current OEM part number

OEM / Related Numbers:

• 21356421

Aftermarket / Verified Equivalents:

• No direct aftermarket manifold equivalent confirmed

• RECMAR: REC21403633 zinc anode fits this manifold family

Associated Service Parts:

• 3883724 - Oxygen sensor; four used in the catalyst system

• 3889435 - Related support bracket

• 21571773 - Catalyst exhaust elbow

• 21519754 - Earlier related elbow reference

• 40005439 - Manifold-to-elbow gasket

• 21403633 - Zinc anode

🚤 Compatibility

Documented engine families:

• 5.0GiCE catalyst engines

• 5.0GXiCE catalyst engines

• 5.7-litre Volvo Penta catalyst petrol engines using the standard-height starboard-hand manifold

• V8-270-C-B and related catalyst V8 installations where the parts diagram specifies 21356421

Documented 5.0-litre suffixes include:

• 5.0GiCE-J

• 5.0GiCE-JF

• 5.0GiCE-M

• 5.0GiCE-MF

• 5.0GXiCE-J

• 5.0GXiCE-JF

• 5.0GXiCE-M

• 5.0GXiCE-MF

• Engine Type: GM-based 5.0L or 5.7L V8 petrol marine engine

• Position: Starboard

• Height: Standard-height

• Confirm manifold height, catalyst elbow, oxygen-sensor ports and engine serial number

🔌 Function

The manifold collects exhaust gas from the cylinder head, transfers it to the catalyst elbow and circulates cooling water around the exhaust passages.

Common signs of failure:

• External water or exhaust leakage

• Rust or corrosion around the water jacket

• Water entering an exhaust port

• Soot at the cylinder-head or elbow joint

• Oxygen-sensor or catalyst efficiency faults

• Engine damage caused by internal manifold leakage

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging