
Key Features:
- Compounded rubber flapper valves prevent water from entering
the exhaust system - Made with weather resistant EPDM with U/V stabilizer
Additional Details:
- Includes: Stainless Steel Clamp
- Size: 3′ or 76.2mm
The Sierra 18-4456 Exhaust Protector Valve Replaces:
GLM
- 89240
Mallory
- 9-44000
Mercruiser Stern Drive
- 34765A2
- 34765A1















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