ALUMINUM LIGHT WEIGHT UNDERDRIVE PULLEY Top Pick

Description

This light-weight pulley greatly reduces the weight in rotating and reciprocating parts, parasitic drag along the drivetrain; it can also reduce the inertial energy loss from the crankshaft.
The power gained by speeding up the crankshaft revolution (UP TO 10 horsepower)
Made by Light Weighted Material Billet Aluminum
Light Weight and Balanced for Maximum Performance
It is bolt-on installation, new belts are required for complete installation and can easily get it from your local auto parts stores.