ISIS [I-sis] Underdrive Crank Pulley - Nissan SR20DET S13

These Pulleys are made from lightweight, high-grade billet aluminum. Computerized CNC machined from solid aluminum for structural integrity to withstand all level of RPM.

lightweight pulleys reduce rotating weight and are slightly oversized to maximize efficiency, which nets more horsepower at the wheels

Requires New Belts Smaller Than OE Size!!