The Sierra 18-4458 Exhaust Protector Flapper Valve helps prevent following water from entering the marine exhaust system.
Includes:Â Stainless Steel Clamp
Size:Â 5" & 6" or 127mm & 152.4mm
Compounded rubber flapper valves prevent water from entering the exhaust system
Made with weather resistant EPDM with U/V stabilizer
5" Requires two 45° cuts
Kit Contains:
18-710-104-2 Hose Clamp 6 1/16 to 7
Need help with fitment? Contact us with your engine model and serial number and we'll help check suitability.
What is Sierra 18-4458?
Sierra 18-4458 is a exhaust protector flapper valve.
Which part numbers cross-reference Sierra 18-4458?
This listing cross-references GLM 89260. See the Cross References & Alternative Products section above for linked alternatives where available.
Australian Dollars
