7-Duramax Marine DuraCooler Keel Cooler 

• 90/10 cupro-nickel tubing is resistant to waterflow erosion and serves as an antifoulant.
• Compact, one-piece design makes installation simple.
• Streamlined header design reduces pressure drop in water flowing through the cooler. External water travels more quickly to tubes increasing the heat transfer efficiency of the cooler.
• Custom-sized for your engine specifications and operational requirements.
• Available with through-hull type fittings or non-through-hull flanges.