Exhaust› Exhaust Pipes, Systems and Components

SIERRAMARINE

EXHAUST ELBOW MOUNTING KIT

$45.05

SKU: S08C 18-8507

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Special Order
Ships in 4–6 weeks
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The Sierra 18-8507 is a marine exhaust elbow mounting kit designed for OMC/Volvo GM Small Block V8 engines. This kit is compatible with 305-350 cubic inch engines. It replaces part numbers Barr CM 20 6674J P, Mallory 9-40672, and Osco 50456-MK. The product is made in Taiwan and comes with a limited lifetime warranty.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandSIERRAMARINE
Part NumberS08C 18-8507

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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