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