Home Exhaust Systems Exhaust Flapper With Clamp 4 in. | Sierra 18-4457
  • Exhaust Flapper With Clamp 4 in. | Sierra 18-4457 - MacombMarineParts.com
  • Exhaust Flapper With Clamp 4 in. | Sierra 18-4457 - MacombMarineParts.com
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Exhaust Flapper With Clamp 4 in. | Sierra 18-4457

Exhaust Flapper With Clamp 4 in. | Sierra 18-4457

Sierra

$29.36 USD
$38.89 USD $29.36 USD
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16 in stock

Exhaust Flapper With Clamp 4 in. | Sierra 18-4457

Sierra 4 in. Exhaust Flapper With Clamp | 18-4457

Exhaust protector valve mounts on the outside of 4 in. exhaust tip to prevent backflow of water into the exhaust.

  • For 4 in. diameter exhaust thru hulls
  • Prevents backflow of water into exhaust system
  • Stainless steel clamp included
  • Designed to mount on the outside of exhaust tips
  • Replaces Mercury 12644A1, 12644Q01
  • Replaces OMC/Johnson/Evinrude 509495
  • Replaces Mallory 9-44001
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