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SIERRAExhaust Flapper Valves

SIERRA

Exhaust Flapper Valves

Heavy duty rubber flapper valve keeps following seas from entering exhaust outlet when moving slowly or stopping.
  • Includes adjustable stainless-steel clamp
Customer Reviews
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
Exhaust Flapper Valve - 3" 394181 18-4456D
Ships when available.

$25.99

Exhaust Flapper Valve - 4" 402695 18-4457D
In stock online.

$23.99

Exhaust Flapper Valve - 5" or 6" 361966 18-4458D
In stock online.

$42.99

Product Description

Heavy duty rubber flapper valve keeps following seas from entering exhaust outlet when moving slowly or stopping.
  • Includes adjustable stainless-steel clamp

Specs

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REVIEW SNAPSHOT®

by PowerReviews
SierraExhaust Flapper Valves
 
3.5

(based on 2 reviews)

Ratings Distribution

  • 5 Stars

     

    (1)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (0)

Reviewed by 2 customers

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5.0

Reassuring to see the exhaust closed

By Motorboat GRACE

from Gilmerton Canal, Virginia

About Me Advanced

Verified Buyer

Pros

  • Good Performance
  • Reliable
  • Weather Resistant

Cons

    Best Uses

      Comments about Exhaust Flapper Valves:

      Replasced at five-year intervals while still functioning perfectly

      (1 of 1 customers found this review helpful)

       
      2.0

      I won't buy this size again.

      By Boater

      from Mobile, AL

      About Me Advanced

      Verified Buyer

      Pros

      • Good Performance

      Cons

      • Poor Design

      Best Uses

        Comments about Exhaust Flapper Valves:

        You can only order it to fit a 5 and 6 inch exhaust but it doesn't work well on the 5 inch exhaust. It distorts when clamped down to fit the 5 inch exhaust. I will use it until I can find one made for a 5 inch exhaust and then replace it.

        Displaying reviews 1-2

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        Questions about this Product?
        1 (800) 262-8464