Sierra 18-8532 Exhaust Manifold Mounting Kit for Mercruiser GM 454

The Sierra 18-8532 Exhaust Manifold Mounting Kit is a complete solution for securing exhaust manifolds on Mercruiser GM Big Block 454 marine engines. Designed by SIERRA, this kit ensures precise fitment and reliable performance, making it ideal for boat owners, marine mechanics, and DIY enthusiasts seeking a dependable replacement.

Each kit includes all the essential hardware and gaskets needed for a straightforward installation, helping you restore your engine's exhaust system with confidence. Compatible with Sierra manifold 18-1957-1 and cross-referenced to GLM 33765 and Osco 9011-MK, it offers a trusted OEM alternative for Mercruiser stern drive applications.

• Complete set of bolts, nuts, washers, lock washers, and gaskets
• Engineered for Mercruiser GM 454 Big Block marine engines
• Direct replacement for Sierra 18-1957-1 manifold mounting hardware
• Also replaces GLM 33765 and Osco 9011-MK kits
• Ideal for exhaust manifold repairs, upgrades, or maintenance
• Supports secure, leak-free exhaust manifold installation

Upgrade your marine engine with the Sierra 18-8532 kit for a reliable, hassle-free exhaust manifold mounting solution.