Stewart Stage 1
pumps use brand new, original equipment castings that are machined to our
exacting standards. Stage 1 pumps are compatible with stock lines and brackets
but are internally modified for performance and reliability! Recommended for
stock, OEM, or mild performance applications.
Stewart Stage 2 water pumps are assembled using the exclusive 356-T6 heat
- treated aluminum casting. These pumps include several significant performance
modifications, compared to Stage 1 pumps, for maximum performance. Recommended
for stock, OEM, or mild-moderate racing applications.
Stewart Stage 3 water pumps are assembled using the exclusive Stewart
356-T6 heat - treated aluminum casting. These pumps feature a 1/2" billet steel
fan hub that is strongly recommended for high RPM applications. Recommended for
any racing application.
Stewart Stage 4 pumps are the cutting edge in performance water pump
technology. The Stage 4 pump utilizes the Stewart Components DRV-8 impeller.
This exclusive 8 vane impeller is fully CNC machined from 6061-T6 billet
aluminum. It's special design flows up to 160 GPM, while consuming less than 3
horsepower at 4,500 pump RPM. Stewart Stage 4 pumps are the ULTIMATE
water pump for any application!