U.S. Customers: Orders shipped from Canada may be subject to U.S. import duties, taxes, and/or tariffs as assessed by U.S. Customs and your carrier. These charges are not included in our product prices or shipping rates. You are responsible for any duties/tariffs/fees due on delivery or prior to delivery.
Packed and shipped within Canada!

Original & OEM Quality Parts

Sierra
18-4457

Exhaust Flapper 4" - 18-4457 - 47-4457F1

LSN 47-4457 MPN 18-4457 UPC 30999621863 MFR Sierra
Express
ON, Warehouse

"Express" items are automated and typically shipped out next available business day and delivered within 4 day.
In Stock
$61.84
Canadian Dollars
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Includes stainless steel hose clamp. Weather resistant rubber flapper valve.

Part #:47-4457
Manufacturer:SIERRA
Manufacturer Part #:18-4457
UPC:030999621863
Order In Multiples Of:1
Size4"
ReplacesMerc 12644A

Variations
47-4456Exhaust Flapper 3"
47-4458Exhaust Flapper 5-6"
Northern Marine Canada
Our products are shipped from Canada!
Parts Warehouse:
Toronto, Ontario, Canada
Head Office:
Kingston, Ontario

About Us

Northern Marine is a Canadian supplier of OEM and premium aftermarket marine and RV parts and accessories. We focus on quality, accurate listings, and dependable fulfillment so you can maintain, repair, and outfit your boat or RV with confidence.

Our goal is simple: get you the right parts, shipped fast, with straightforward service you can count on.