The Stewart booster pump is a slick piece. It installs in the lower radiator hose and when it is off, water will flow thru it. When it is on it flows around 55 gph. I have one that is going on my GTO. These pumps are really small and only draw around 8 amps. Overall length is just under 6.5" and its about 4.5" diameter. There is a mount built into the pump body.
