Sierra 18-1908K Manifold Riser Spacer Kit, Includes Elbow Gaskets, for Use with Riser 18-1976-2

The Sierra 18-1908K Manifold Riser Spacer Kit is a complete exhaust manifold spacer package built for I/O engine cooling systems that use riser 18-1976-2. The kit centers on the 18-1908 manifold spacer and includes the gaskets needed to seal the connection, so the elbow gasket hunt is eliminated at install time. Each kit ships with one 18-2849-1 elbow gasket and one 18-0897 elbow gasket, matched specifically for use with the 18-1908 spacer and 18-1976-2 riser combination.

Construction is metal, matching the durability expected of an exhaust manifold component that sees sustained heat and marine moisture exposure. The kit is packaged as a single unit count, ready to install without sourcing separate gaskets or hardware. It is intended as a direct fit for the riser and spacer combination it is designed for, simplifying maintenance on the exhaust cooling path of applicable I/O setups.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-1908K
• Product Type: Manifold Riser Spacer Kit
• Material: Metal
• Included Components: Manifold spacer 18-1908, (1) elbow gasket 18-2849-1, (1) elbow gasket 18-0897
• Use With: Riser 18-1976-2
• Unit Count: 1
• Fit Type: Universal Fit
• Weight: 16.5 pounds
• UPC: 808282159399

Fitment

Designed for use with riser 18-1976-2 on applicable I/O exhaust cooling systems.

Replaces (OEM)

No OEM cross-reference numbers are specified for this kit.

Frequently Asked Questions

What is included in the Sierra 18-1908K kit? The 18-1908K kit includes the 18-1908 manifold spacer along with one 18-2849-1 elbow gasket and one 18-0897 elbow gasket, giving you the spacer and both gaskets needed for the installation in a single package.

What riser does the 18-1908K manifold spacer kit work with? This kit is designed for use with riser 18-1976-2, so it pairs the 18-1908 spacer and its gaskets specifically for that riser.

Is the 18-1908K a full gasket set or just the spacer? It is a complete kit, not just a bare spacer: the 18-1908 spacer ships together with the 18-2849-1 and 18-0897 elbow gaskets required to seal it in place.

What material is the Sierra 18-1908K spacer made from? The manifold spacer in the 18-1908K kit is made of metal, consistent with the durability needed for an exhaust manifold cooling component.

How much does the 18-1908K kit weigh? The Sierra 18-1908K Manifold Riser Spacer Kit weighs 16.5 pounds.

How many units come in one 18-1908K package? Each 18-1908K package is a single unit count, containing one manifold spacer and the two elbow gaskets listed for that kit.

Are there OEM cross-reference numbers for the 18-1908K kit? No OEM cross-reference or replacement numbers are specified for the 18-1908K kit itself; it is identified by its own part number, 18-1908K.

Do I need to buy separate gaskets for the 18-1908K spacer? No, separate gaskets are not needed: the 18-1908K kit already includes one 18-2849-1 elbow gasket and one 18-0897 elbow gasket alongside the manifold spacer.

What is the UPC for the Sierra 18-1908K kit? The Sierra 18-1908K Manifold Riser Spacer Kit carries UPC 808282159399.

Is the Sierra 18-1908K compatible with other risers besides 18-1976-2? The 18-1908K kit is specified for use with riser 18-1976-2; compatibility with other risers is not indicated.

What brand makes the 18-1908K manifold spacer kit? The 18-1908K Manifold Riser Spacer Kit is made by Sierra.