PCM Exhaust System Gasket – Catalytic | RM0274
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PCM Exhaust System Gasket – Catalytic | RM0274
Stop exhaust leaks before they become a safety issue. This OEM-specification exhaust gasket seals the connection between exhaust components in PCM catalytic converter-equipped inboard engines, preventing hot exhaust gases from escaping at the joint. A failed or compressed exhaust gasket lets combustion gases into the bilge or engine compartment — a hazard that goes beyond engine damage.
Made from high-temperature resistant material rated for the heat and vibration cycles of a marine exhaust system, this gasket provides a reliable, long-lasting seal when installed correctly. Using an OEM-spec gasket ensures the correct thickness, bore size, and material for the application — generic substitutes often compress unevenly or fail prematurely under marine exhaust temperatures.
Best Use Case
Best suited for exhaust system service on PCM catalytic converter-equipped inboard engines, including the Excalibur 330, EX343, ZR409, and ZR6 — engines commonly found in Correct Craft and Nautique ski, wake, and surf boats. Replace any time exhaust components are disassembled for service, when an exhaust leak is detected by smell or sound, or when the existing gasket shows compression set, cracking, or burn-through. Always replace the gasket rather than reusing the original when reassembling exhaust joints.
- Type: Exhaust system gasket
- Application: PCM catalytic converter-equipped inboard engines
- Material: High-temperature marine exhaust gasket material
- Part number: RM0274
- Cross-reference: RM0274A (updated/alternate version)
- Sold individually
Parts Desk Insights
Exhaust gasket fitment on PCM engines varies by model, exhaust configuration, and serial number range — confirm using your engine model and serial number before ordering. RM0274 is specific to catalytic converter exhaust systems; non-cat PCM engines use different gasket part numbers. Note that RM0274A is listed as an updated or alternate version — if RM0274 is not available, check with the parts desk to confirm whether RM0274A is a direct substitute for your application. When reassembling exhaust joints, torque fasteners to spec and inspect the mating flanges for warping or corrosion that could prevent a proper seal even with a new gasket.
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.