Sierra 18-8534 Exhaust Elbow Mounting Kit for OMC/GM Small Block V8 305-350 CID Risers (1979-1989)

The Sierra 18-8534 Exhaust Elbow Mounting Kit supplies the mounting hardware needed to install an exhaust elbow/riser onto compatible marine engine manifolds. It is designed for OMC and GM small block V8 engines in the 305-350 cubic inch displacement range (1979-1989), and also has multiple applications for Ford and GM exhaust risers. The kit is built to be used with Sierra manifold part numbers 18-1902 and 18-1903, giving installers the correct hardware set to complete a riser or manifold replacement without hunting down individual bolts separately.

Like other Sierra exhaust system components, this mounting kit is engineered to meet the demands of high horsepower marine engines and to hold up in the harsh marine environment, matching or exceeding the performance of the original equipment hardware it replaces. It ships as a compact, low weight hardware kit intended for straightforward bolt-in installation during exhaust manifold or riser service.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-8534
• Product Type: Exhaust Elbow Mounting Kit
• Use With Manifold: 18-1902, 18-1903
• Weight: 0.24 pounds
• Item Dimensions: 0.39 x 0.39 x 0.39 inches
• Material: Glass
• Color: White
• UPC: 808282127268

Fitment

• OMC/GM Small Block V8 305-350 cubic inch engines (1979-1989)
• Multiple applications for Ford and GM exhaust risers
• Use with Sierra manifold 18-1902 or 18-1903

Replaces (OEM)

• No OEM cross-reference numbers listed

Frequently Asked Questions

What is the Sierra 18-8534 Exhaust Elbow Mounting Kit used for? It supplies the mounting hardware needed to install an exhaust elbow or riser onto a compatible manifold, so it is used alongside a manifold replacement or riser service rather than sold as a standalone elbow.

What engines does the 18-8534 mounting kit fit? It fits OMC and GM small block V8 engines in the 305-350 cubic inch range from 1979-1989, and also has multiple applications for Ford and GM exhaust risers.

Which manifolds is Sierra 18-8534 designed to work with? This mounting kit is intended for use with Sierra manifold part numbers 18-1902 and 18-1903.

How much does the 18-8534 mounting kit weigh? The Sierra 18-8534 Exhaust Elbow Mounting Kit weighs 0.24 pounds.

What are the dimensions of this mounting kit? Item dimensions for the 18-8534 kit are 0.39 x 0.39 x 0.39 inches.

What material is the Sierra 18-8534 kit made from? The kit's listed material is glass, and it is finished in white.

Does the 18-8534 kit include mounting bolts? Yes, mounting bolts for the exhaust elbow are included as part of the Sierra 18-8534 kit.

Is the 18-8534 an OEM or aftermarket part? Sierra 18-8534 is a Sierra-brand replacement kit engineered to meet or exceed the performance of the original equipment hardware it replaces.

Does Sierra 18-8534 come with a manifold gasket? No, the manifold gasket for this application is a separate part, Sierra 18-2949, which is not included in the 18-8534 mounting kit.

Is the Sierra 18-8534 mounting kit covered by a warranty? Yes, this kit is covered under Sierra's standard limited warranty like other Sierra marine parts.