Custom Crank Underdrive Pulley

The 3SX Custom Crank Underdrive Pulley is a performance upgrade for 1992-1999 DOHC 3000GT/Stealth models. This pulley is CNC 6061 machined from billet aluminum, weighing only 1.5 pounds, significantly less than the stock steel pulley which weighs 6.7 pounds. By reducing rotational mass, it frees up horsepower to the wheels.

The underdrive design also reduces the speed of the alternator and AC compressor, decreasing drag on the engine. It's important to note that this underdrive pulley slows the alternator, potentially reducing charging capacity. For vehicles with significant aftermarket stereo systems, the 3SX Stock Sized Pulley is recommended instead.