Mercruiser GM Small Block Exhaust Manifold | Sierra 18-1951-1
Mercruiser GM Small Block Exhaust Manifold | Sierra 18-1951-1
Sierra
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Mercruiser GM Small Block Exhaust Manifold | Sierra 18-1951-1
Starboard exhaust manifold fits Mercruiser GM 5.0L & 5.7L marine engines with end riser.
- Mercruiser log style exhaust manifold
- Direct replacement manifold fits Mercruiser GM V8 small block 305 and 350 cu. in. engines from 1977 to 1982 with end riser
- For Mercruiser 198, 228, 255, 260, and 898 model engines
- Starboard side
- Heavy duty cast iron
- Painted black
- Includes all gaskets, riser studs, and drain plugs
- Manifold mounting kit P/N 18-8548 – sold separately
- Replaces Mercruiser 77235A2, 77235A8
- Replaces Osco 7235B
- Replaces Sierra 18-1951
! Compatibility references are provided for informational purposes only and do not constitute a fitment guarantee. Part numbers, application listings, and "replaces" cross-references are based on manufacturer data and are intended as a starting point for identification — not a guarantee of fit for your specific engine, hull, or installation.
Buyer is solely responsible for verifying compatibility with their engine model, serial number, model year, and trim configuration before purchase. If you are unsure whether this part fits your application, contact MacombMarineParts.com before you buy — we're available via text, email, or online chat to help verify compatibility for your specific application.
MacombMarineParts.com is not liable for parts ordered based on assumed fitment. Returns due to buyer-selected incorrect fitment are subject to our standard return and restocking fee policies.