Sierra 118-8520 Exhaust Manifold Mounting Kit for MerCruiser GM V8

The Sierra 118-8520 (also known as 18-8520) is a complete exhaust manifold mounting kit designed for MerCruiser marine engines. This essential hardware kit provides all the necessary components required to properly install Sierra exhaust manifolds on GM small block V8 applications.

Key Features:

• Complete mounting hardware kit for exhaust manifold installation
• Designed for use with Sierra manifolds including 18-1953-2 and compatible center-rise applications
• Fits MerCruiser GM small block V8 engines (305, 350, 377 CID)
• Also compatible with Marine Power GM 5.0L, 5.7L, and 6.2L V8 Enpac models
• Precision-engineered components ensure proper manifold-to-engine mounting
• One kit services one manifold (order two kits for complete engine service)

This mounting kit is specifically required when installing Sierra replacement exhaust manifolds and includes all necessary fasteners and components for a secure, leak-free installation. Engineered to meet or exceed OEM specifications, Sierra hardware is built to withstand the harsh marine environment and provide reliable long-term performance.