From Stewart:
"Engines always run cooler at higher water flow rates. Stewart Components water pumps flow more water at all RPM than others. Cavitation does not occur even at over 8,500 RPM. Horsepower consumption of a Stewart water pump is only .91 at 4,000 RPM."
Stewart water pumps are the premier choice of professional engine builders, race teams, and performance enthusiasts, from street rodding and OEM replacement applications, to the most extreme forms of motorsports in the world, including NASCAR Winston Cup and NHRA Pro Stock.
For over 25+ years, Stewart has focused on the development and production of high performance water pumps, resulting in innovations like special high-strength castings, larger flow passages, more efficient impellers, and stronger bearings. Every Stewart pump is hand-assembled