Flapper Exhaust Protector Valve With Clamp "5 & 6" SIERRA-18-4458 - CLEARANCED
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5.0L - 5.7L - 7.4L - 305 - 350 - 454 GM EXHAUST PCM
Flapper Exhaust Protector Valve With Clamp "5 & 6" SIERRA-18-4458 - CLEARANCED
Exhaust protector valve mounts on the outside of 5 in. & 6 in. exhaust tip to prevent backflow of water into the exhaust.
- For 5 and 6 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 Mallory 9-44002