Sierra 18-4348 Exhaust Manifold Gasket Set for MerCruiser GM 454 502 7.4L 8.2L

The Sierra 18-4348 Exhaust Manifold Gasket Set is designed for GM (Chevy) 454, 502, 7.4-Liter, and 8.2-Liter engines with center riser type exhaust manifolds. Sierra Marine exhaust manifold gaskets are engineered to meet or exceed manufacturer specifications, providing reliable sealing for marine stern drive applications.

What's Included:

• Two (2) 18-0418 Exhaust Manifold Mounting Gaskets
• Two (2) 18-0897 Exhaust Elbow Gaskets (RWC restrictor gaskets for risers)

Key Features:

• Fits center riser type manifolds OSC9011 and MC-1-89011
• Manufactured to stringent quality standards and fully interchangeable with OEM products
• Designed to perfectly match the exhaust ports for your engine
• Interchangeable with GLM 39890

Exhaust manifolds take a beating in the watercraft environment and require regular inspection to avoid catastrophic engine failure, making it equally important to replace the gaskets after an inspection or replacement. This complete gasket set ensures proper sealing for both the manifold mounting surfaces and exhaust elbow connections.