This Sierra End Cap / Riser Mounting Kit is a high-quality replacement for Chrysler LM318, M340, and M360 marine engines with log-style manifolds (no hole).
Designed for proper sealing and reliable exhaust flow, this kit includes the necessary components to install or service your end caps or risers.
Manufactured by Sierra Marine, it meets or exceeds OEM performance standards, providing a precise fit and long-lasting durability in harsh marine conditions.
Product Features
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Type: Replacement
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Brand: Sierra Marine
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Manufacturer Part #: 18-8506
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Cross Reference #: 9-40376 / OSC480-MK-FW
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Fitment: Chrysler LM318, M340, M360 marine engines
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Manifold Style: Log Style (No Hole)
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Function: End Cap / Riser Mounting Kit
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Condition: 100% brand-new Sierra Marine replacement kit
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Warranty: Manufacturer’s limited warranty through Sierra Marine
Additional Information
Note: All Sierra Marine components are built to exact OEM dimensions and designed for direct fitment.
If you need matching gaskets, risers, or elbows for your setup, please email or fill out the contact form and we’ll assist you in finding all compatible components.
Shipping Information
SHIPPING: Additional shipping fees to Alaska, Hawaii, U.S. Territories, or international destinations will be calculated after checkout.
You will receive an email and a PayPal money request for the additional shipping charges at the email address provided.
(Some items are excluded from international shipping.)
Customer Support
For questions or to confirm compatibility, please email customerservice@marinepartswarehouse.com .
Please include your engine model number to help confirm proper fitment before ordering.
