Our S.B.Chevy long water pump high performance flat belt pulley system is designed for long water pumps with a 7" flange height, common on most stock long water pump GM applications. These pulleys line up with most GM factory pulleys, brackets, and pumps, or can be used as sets with our accessories and mounting brackets.
The two belt pulley system is desgined to free up horsepower and increase high RPM performance with lower crank to accessory ratios:
Water pump 80% of crank speed
Power steering 62% of crank speed
Alternator 160% of crank speed.
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