Sierra 47-29499 Exhaust Manifold Gasket | Fits Manifolds 18-1902 & 18-1903
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You have 30 days to request a return. All sale items are final sale.
Sierra 47-29499 Exhaust Manifold Gasket
A direct-fit replacement exhaust manifold gasket for marine inboard and stern drive engines. The Sierra 47-29499 is engineered to seal the joint between the exhaust manifold and the engine block, preventing exhaust leaks that can lead to overheating, corrosion, and dangerous carbon monoxide buildup in the bilge. Built to meet or exceed OEM specifications for a reliable, long-lasting seal.
Fitment
- Compatible manifolds: Sierra 18-1902, 18-1903
Parts Desk Insights
This gasket is the correct choice when servicing or replacing manifolds 18-1902 or 18-1903. As with any exhaust gasket, always install a fresh gasket any time the manifold is removed — reusing a compressed gasket is a common cause of post-service exhaust leaks. If you're doing a full exhaust system refresh, also consider the compatible Sierra Exhaust Manifold 47-19563 or Sierra Exhaust Manifold 47-19572. For elbow gaskets on the same system, see the Sierra 47-06729 Exhaust Elbow Gasket 2-Pack or the Sierra 18-0943-2 Exhaust Elbow Gasket 2-Pack. SKU: 47-29499.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.