Description
SIERRA Exhaust Elbow Mounting Kit for OMC/Volvo GM V6/V8 – 18-8507 is used to install a matching Sierra exhaust riser/elbow on selected OMC and Volvo Penta GM marine engines.
The kit is associated with center-rise exhaust arrangements and includes the service hardware needed at the riser joint.
Key Features
- Fit-specific OMC/Volvo Penta exhaust service kit
- Supports selected GM V6/V8 center-rise exhaust systems
- Includes exhaust gasket and mounting fasteners
- Designed for approximately 7-7/8 in. riser mounting hardware applications
- Confirm the mating pattern, cooling-passage arrangement and engine application before installation.
Specifications
- Manufacturer Part Number: 18-8507
- Product Type: Exhaust elbow/riser mounting kit
- Engine Family: Selected GM V6/V8 marine engines
- Brands: OMC / Volvo Penta
Interchange / Cross Reference
- OMC 909786 (gasket reference)
- Mallory 9-40672
- Osco 50456-MK
Confirm the exhaust riser/elbow casting and engine application before ordering.


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