Product Overview
Manifold

Ensure peak performance and reliability for your MerCruiser big block V8 with the Sierra Manifold. This crucial component is engineered to exacting standards, offering a perfect fit and durable construction to handle the demands of the marine environment. Replace your old, worn manifold with confidence and keep your engine running smoothly for years to come. This Sierra Manifold is designed for most MerCruiser (GM) V-8 big blocks with a center-riser manifold extension, providing optimal exhaust flow for increased power and efficiency.
Key Features
- **Direct Replacement:** Designed as a direct replacement for MerCruiser part numbers 89011A8 and 807078A6, ensuring a hassle-free installation.
- **Durable Construction:** Built to withstand the harsh marine environment, ensuring long-lasting performance and reliability.
- **Precise Fit:** Engineered for a precise fit on most MerCruiser (GM) V-8 big blocks with center-riser manifold extension.
- **Improved Performance:** Optimized exhaust flow enhances engine power and efficiency.
- **Compatible with Sierra Gasket and Mounting Kit:** Use with Sierra Exhaust Manifold Gasket (18-0418) and Mounting Kit (18-8532) for a complete and seamless installation (sold separately).
- **Multiple Part Number Cross-Reference:** Compatible with Kimpex, supplier, and OEM part numbers for easy identification and ordering.
- **Backed by Sierra Quality:** Benefit from Sierra's reputation for manufacturing high-quality marine engine parts.
Specifications
The Captain's Take
After years of battling the elements, I know the importance of reliable engine components. The Sierra Manifold is a top-notch replacement for my MerCruiser big block. It's a perfect fit, built tough, and gives me the peace of mind I need out on the water. I highly recommend this manifold to any captain looking for a quality, long-lasting solution.