Sierra 18-4458 Exhaust Protector Valve - 5" and 6"

For use on Chris-Craft Inboard; Chrysler Inboards; Crusader Inboards; Pleasurecraft (PCM) Waukesha and Mercury/Mariner Inboard/Outboard.Fits both 5 & 6 Exhaust.Includes Stainless Steel clamp.