Specifically designed for short or Corvette water pumps
Pulleys work with power steering pump and pulley to provide a ratio within the GM specified RPM range. Race engine RPM differs greatly from street engines.
For 30% less water pump speed and reduced weight and inertia, the crankshaft and water pump pulleys are smaller in diameter than standard reduction pulleys.
Acceleration capabilities are greatly enhanced.
Note: Crankshaft pulley will work with either water pump pulley withoutspacers.