Sierra Exhaust Riser Gasket 18-0677-1-9, Fits 18-1899 Riser, Pack of 2

The Sierra 18-0677-1-9 is an exhaust riser gasket sold in a package of 2, designed for use with the Sierra 18-1899 riser (3 inch outlet). This gasket seals the connection point on the exhaust riser, helping maintain a leak-free joint that keeps exhaust gases and cooling water properly routed away from the engine compartment. It is also included as a component in the Sierra 18-8504 mounting kit, which bundles the gasket together with the mounting bolts needed to install the 18-1899 riser.

Because exhaust riser gaskets are a wear item that degrade with heat cycling and vibration, keeping a spare pack of 2 on hand makes it easy to replace the gasket whenever the riser is removed for service or replacement, without having to purchase a full mounting kit if the bolts are still in good condition. This gasket is specific to the 18-1899 riser application; it is not the same gasket used with the 18-1996 manifold, which instead uses the Sierra 18-0183-1 manifold gasket.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-0677-1-9
• Product Name: Exhaust Elbow Gasket
• Package Quantity: 2
• Weight: 0.04 pounds
• UPC: 808282381417
• Used With: Sierra 18-1899 Riser (3 inch outlet)
• Included In: Sierra 18-8504 Mounting Kit

Fitment

• Sierra 18-1899 exhaust riser (3 inch outlet)

Replaces (OEM)

• No manufacturer catalog cross-reference numbers are listed for this gasket

Frequently Asked Questions

What is the Sierra 18-0677-1-9 gasket used for? It is an exhaust riser gasket that seals the connection on the Sierra 18-1899 exhaust riser, which has a 3 inch outlet.

Does this gasket fit the 18-1899 exhaust riser? Yes, the 18-0677-1-9 gasket is designated for use with the Sierra 18-1899 riser.

How many gaskets are included in this package? Each package of the 18-0677-1-9 gasket contains 2 gaskets.

Is this gasket also sold as part of a mounting kit? Yes, this gasket is included in the Sierra 18-8504 mounting kit, which also contains the mounting bolts for the 18-1899 riser.

How much does the 18-0677-1-9 gasket package weigh? The package weighs 0.04 pounds.

Is the 18-0677-1-9 gasket the same one used with the 18-1996 manifold? No, the 18-1996 manifold uses a different gasket, the Sierra 18-0183-1 manifold gasket, which is included in the separate 18-8503 mounting kit.

Do I need to buy new mounting bolts when replacing this gasket? Mounting bolts are not included with the 18-0677-1-9 gasket pack on its own; they come bundled only in the Sierra 18-8504 mounting kit.

What UPC is associated with this gasket? The UPC for the Sierra 18-0677-1-9 exhaust riser gasket is 808282381417.

Can I buy just the gasket instead of the full mounting kit? Yes, the 18-0677-1-9 is sold separately as a pack of 2 gaskets, apart from the 18-8504 mounting kit.

What part does the 18-0677-1-9 gasket connect to on the riser? It seals the mounting joint of the Sierra 18-1899 riser, which is the riser with a 3 inch outlet.