Sierra Exhaust Elbow Mounting Kit 18-8535, Blocked Gasket, Closed Cooling System, Fits Risers 18-1939, 18-1999, 18-1907

The Sierra 18-8535 Exhaust Elbow Mounting Kit is a blocked-gasket mounting kit built for marine engines running a closed cooling system. It is used on Chrysler inboard exhaust manifold setups and installs with exhaust risers 18-1939, 18-1999, and 18-1907, making it a direct match for boats already running one of those risers. The kit includes the 18-0476-1 elbow gasket, the blocked-style gasket required for closed cooling systems, so the elbow-to-riser joint seals correctly without introducing raw water into a closed loop. Choosing the correct gasket type matters: an open-gasket kit is intended for open (raw water) cooling systems, while this 18-8535 kit's blocked gasket is specifically for closed systems, so installers should confirm their cooling configuration before ordering. The kit is compact and lightweight, finished in white, and is sized to drop into the existing elbow mounting hardware on compatible risers. It is sold as a complete small-parts kit rather than an individual gasket, so the correct blocked elbow gasket is on hand at install time instead of being sourced separately.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-8535
• Type: Exhaust Elbow Mounting Kit
• Gasket Type: Blocked (for closed cooling system)
• Included Gasket: 18-0476-1 Elbow Gasket
• Compatible Risers: 18-1939, 18-1999, 18-1907
• Application: Chrysler Inboard Exhaust Manifolds
• Color: White
• Item Dimensions: 0.39 x 0.39 x 0.39 inches
• Weight: 0.24 pounds
• UPC: 808282127275

Fitment

• Used with exhaust risers 18-1939, 18-1999, and 18-1907
• For Chrysler inboard exhaust manifolds with a closed cooling system

Replaces (OEM)

• No OEM cross-reference numbers are listed for this part number.

Frequently Asked Questions

What is included in the Sierra 18-8535 Exhaust Elbow Mounting Kit? The 18-8535 kit includes the 18-0476-1 blocked elbow gasket, which is the gasket needed for a closed cooling system installation.

Which exhaust risers is the 18-8535 mounting kit compatible with? This kit is used with exhaust risers 18-1939, 18-1999, and 18-1907.

Is the Sierra 18-8535 kit for an open or closed cooling system? It is for a closed cooling system, since it includes the 18-0476-1 blocked-style elbow gasket rather than an open gasket.

What is the difference between the 18-8535 kit and an open-gasket mounting kit? The 18-8535 kit uses the blocked 18-0476-1 elbow gasket for closed cooling systems, while an open-gasket kit uses a different gasket for open (raw water) cooling systems and is a separate part number.

What engine application is the 18-8535 mounting kit designed for? It is designed for Chrysler inboard exhaust manifold setups that use one of the 18-1939, 18-1999, or 18-1907 risers.

What color is the Sierra 18-8535 Exhaust Elbow Mounting Kit? The kit is finished in white.

How much does the 18-8535 Exhaust Elbow Mounting Kit weigh? It weighs 0.24 pounds.

What are the dimensions of the 18-8535 kit? The kit measures 0.39 x 0.39 x 0.39 inches.

Does the 18-8535 kit come with mounting hardware or just the gasket? The 18-8535 is sold as a mounting kit built around the 18-0476-1 elbow gasket, rather than as a standalone gasket.

What is the UPC for the Sierra 18-8535 Exhaust Elbow Mounting Kit? The UPC is 808282127275.

Are there OEM cross-reference numbers for the 18-8535 kit? No OEM cross-reference numbers are listed for part number 18-8535.

Can the 18-8535 kit be used with any exhaust riser? No, it is intended for use with risers 18-1939, 18-1999, and 18-1907 specifically.