I talking about a Procharger unit. I believe it is a AW504. I can't find a lot of info but I assume you could plumb it into engine cooling system or a separate cool water tank. They use these with some pretty big superchargers so I doubt the air flow would be a problem. I know there are some who use the W/A systems in autos and it would appear that set up correctly it would be more efficient than an A/A system. Anyone have any experience????