4 Cylinder Exhaust Manifold to Head Gasket | Sierra Exhaust 18-1204-1
4 Cylinder Exhaust Manifold to Head Gasket | Sierra Exhaust 18-1204-1
Sierra
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4 Cylinder Exhaust Manifold to Head Gasket | Sierra Exhaust 18-1204-1
Combination intake & exhaust manifold gasket fits GM 3.0L 4 cylinder marine engines with non-Vortec cylinder heads.
- Exhaust manifold gasket
- For GM 2.5L and 3.0L engines from approximately 1987 to 1990 with non-Vortec cylinder heads
- Will not work with all 3.0L engines - refer to engine model and serial for correct gasket
- Intake and exhaust ports are not square
- Replaces Mercury 27-96429
- Replaces OMC 912164
- Replaces Mallory 9-61419
- Replaces Sierra 18-1204
! 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.