Sierra Exhaust Manifold Mounting Kit 18-8524 for GM Big Block V8 454 CH350/454XL Manifolds 18-1929 & 18-1933

The Sierra Exhaust Manifold Mounting Kit, part number 18-8524, supplies the hardware needed to mount Sierra exhaust manifolds to a GM Big Block (V8) 454 cu.in. Engine on Models CH350 and 454XL. This kit is used with Sierra exhaust manifold 18-1929 (Starboard) and exhaust manifold 18-1933 (Port), giving boat owners a matched mounting solution for either side of the engine when installing or replacing exhaust manifolds. It is designed to pair with Manifold Gasket 18-0418, which seals the manifold-to-block joint once the mounting hardware from this kit is in place.

Because 18-8524 is specified as the mounting kit for both the starboard manifold (18-1929) and the port manifold (18-1933), a single kit covers the hardware needs referenced by either manifold's catalog listing, simplifying parts ordering for a full manifold replacement job. The kit is compact and lightweight at 0.24 pounds, with overall packaged dimensions of 0.75 x 7 x 22 inches, making it easy to store or ship alongside the manifolds and gasket it is used with.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-8524
• Product Type: Exhaust Manifold Mounting Kit
• Used With Manifold (Starboard): 18-1929
• Used With Manifold (Port): 18-1933
• Engine Fitment: GM Big Block (V8) 454 cu.in. (Models CH350 & 454XL)
• Used With Manifold Gasket: 18-0418
• Weight: 0.24 pounds
• Product Dimensions: 0.75 x 7 x 22 inches
• UPC: 808282127206

Fitment

• GM Big Block (V8) 454 cu.in. - Models CH350 & 454XL
• Used with exhaust manifold 18-1929 (Starboard) and exhaust manifold 18-1933 (Port)

Frequently Asked Questions

What is the Sierra 18-8524 mounting kit used for? Sierra part number 18-8524 is an exhaust manifold mounting kit that supplies the hardware for installing Sierra exhaust manifolds 18-1929 (Starboard) and 18-1933 (Port) on a GM Big Block (V8) 454 cu.in. Engine, Models CH350 and 454XL.

Does 18-8524 fit both the port and starboard exhaust manifolds? Yes, one 18-8524 mounting kit is specified for use with both exhaust manifold 18-1929 (Starboard) and exhaust manifold 18-1933 (Port), so it works for either side of the engine.

What engines is the 18-8524 mounting kit designed for? It is designed for the GM Big Block (V8) 454 cu.in. Engine, specifically Models CH350 and 454XL.

What gasket should be used with the 18-8524 mounting kit? Manifold Gasket 18-0418 is designed to be used together with exhaust manifolds 18-1929 and 18-1933, which the 18-8524 mounting kit installs.

How much does the Sierra 18-8524 mounting kit weigh? The Sierra Exhaust Manifold Mounting Kit 18-8524 weighs 0.24 pounds.

What are the dimensions of the 18-8524 kit as packaged? The 18-8524 mounting kit measures 0.75 x 7 x 22 inches as packaged.

Is 18-8524 a genuine Sierra part? Yes, 18-8524 is a genuine Sierra exhaust manifold mounting kit, identified by Sierra's own part number and UPC 808282127206.

Do I need one 18-8524 kit or two for a full manifold replacement? Since 18-8524 is listed as the mounting kit for both exhaust manifold 18-1929 and exhaust manifold 18-1933, a full manifold replacement on both sides of the engine requires one kit for each manifold, or two total.

What is included in the Sierra 18-8524 kit? The 18-8524 is a mounting hardware kit for exhaust manifolds 18-1929 and 18-1933; it does not include the manifold itself or the manifold gasket (18-0418), which are separate parts.

Can 18-8524 be used on a small block GM engine? 18-8524 is specified for the GM Big Block (V8) 454 cu.in. Engine, Models CH350 and 454XL; no small block fitment is listed for this mounting kit.