21571538 Manifold | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta 21571538 - Part Number: Starboard 8.1L Catalysed Exhaust Manifold

A genuine starboard-side centre-rise exhaust manifold used on Volvo Penta 8.1L catalysed petrol marine engines. It collects exhaust from the starboard cylinder bank and directs it through the catalyst and downstream exhaust connection while circulating cooling water around the manifold casting.

⚙️ Key Features

• Genuine Volvo Penta starboard-side exhaust manifold

• Centre-rise design for 8.1L catalysed petrol engines

• Water-jacketed construction controls exhaust temperature

• Factory-machined cylinder-head, catalyst and outlet connections

• Manifold only; gaskets and mounting hardware are not included

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 21571538 (current OEM reference)

OEM / Related Numbers:

• 3848809 - related original / casting reference

• 21571539 - separately catalogued opposite-side or configuration-specific manifold

• 21571540 - related 8.1L exhaust-manifold reference

• 21571541 - related 8.1L exhaust-manifold reference

Aftermarket / Verified Equivalents:

• No aftermarket equivalent

🚤 Compatibility

Commonly used on:

• Volvo Penta 8.1L catalysed petrol marine exhaust systems

Typically suits:

• Engine models:

• 8.1GiCE-J

• 8.1GiCE-JF

• 8.1GiCE-M

• 8.1GiCE-MF

• HP Range: Approximately 375HP - 420HP, depending on engine calibration

• Engine Type: GM-based 8.1L V8 multi-port fuel-injected petrol marine engine

• Year Range: Approximately 2011 - 2015 production-era applications

• Fitment Note: Confirm starboard position, complete engine suffix and serial number before ordering; gaskets and fasteners must be ordered separately.

🔌 Function

Collects exhaust from the starboard cylinder bank, routes it through the catalyst and transfers cooling water through the manifold jacket to limit exhaust-system temperature.

Common signs of failure:

• Rust or water staining around the manifold or catalyst joint

• Exhaust ticking, soot marks or fumes in the engine compartment

• Internal corrosion allowing water into a cylinder

• Misfire, hard starting or hydrolock after shutdown

• Overheating or restricted cooling-water flow

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging