Stewart 43103 Stage 4 High-Performance Water Pump Small Block Chevy Short

The Stewart 43103 is a premium Stage 4 high-performance mechanical water pump designed specifically for small block Chevrolet short style applications, including 1971-82 Corvettes. This is the ultimate water pump for demanding racing and high-performance street applications.

Advanced DRV-8 Impeller Technology:

The Stage 4 pump features Stewart's exclusive DRV-series 8-vane impeller, fully CNC-machined from 6061-T6 billet aluminum. This advanced design flows up to 160 GPM and delivers 41% more water flow at twice the pressure of traditional designs, while consuming less than 3 horsepower at 4,500 RPM.

Premium Construction Features:

• Exclusive 356-T6 heat-treated aluminum casting with special ribbing for maximum strength
• Heavy-duty 3/4" ball/roller bearings offering five times the strength of standard bearings
• Precision-ground 1/2" billet steel fan hub with dual bolt pattern and set screw for positive positioning
• Zinc-plated rear cover and bolts for corrosion resistance
• Special water/antifreeze compatible seal assembly
• Stock external dimensions and hose locations for easy installation

Performance Benefits:

• Equal flow distribution to left and right cylinder heads
• Maximum flow and pressure for extreme cooling demands
• Low horsepower consumption for more power to the wheels
• Two 1/2" NPT auxiliary inlets for versatility

Important Note: This pump requires the use of a Stewart high-flow modified thermostat (not included). Backed by a full one-year manufacturer's warranty. Recommended for the most demanding racing and high-performance applications.