Manifold Riser Spacer

The Sierra Manifold Riser Spacer helps create the correct spacer height between your engine manifold riser components for proper exhaust alignment.

Key Features

• Brand: Sierra
• Part name: Manifold Riser Spacer
• For use in marine exhaust system installations where a riser spacer is required

Product Compatibility

• Marine exhaust/muffler systems (engine exhaust routing)
• Stern drive exhaust installations that require a manifold-to-riser spacer (application details should be confirmed against your engine/exhaust elbow/manifold parts)

Product Details

• Manifold Riser Spacer (Sierra)
• SKU: 47-1908
• Quantity: Sold individually (each)
• Use with compatible manifold and elbow components listed for this spacer in exhaust system builds (confirm in your parts diagram/service manual).

Parts Desk Insights

Best Use Case: Use when rebuilding or updating an exhaust path where the manifold-to-riser spacing needs to match the original exhaust geometry.

Common Issues: Common causes of rework include mixing spacer and gasket thicknesses, misaligned mating faces, or reusing mismatched manifold/elbow gasketsverify the correct mating components from the exhaust parts diagram before final assembly.

Related Products & Accessories

• Manifold Riser Spacer Kit (where listed for 18-1908K) – Browse the related manifold/elbow spacer and gasket items for your exhaust assembly.