GScreations worked closely with Metco Motorsports to bring this to the market.

Supercharger Idler Pulley

Extreme-Duty, Double-Bearing Design

2015-2019 C7 Z06

This 100mm billet idler pulley is designed to replace the factory idler pulley located directly beneath and to the right of the crank pulley.

The larger diameter of this idler pulley offers a modest increase in belt wrap at the supercharger pulley, which is beneficial in applications using overdrive (smaller) supercharger pulleys.  Most importantly, this pulley offers a substantial improvement in durability and under-hood appearance.  Larger diameter idler pulleys such as this one contribute to a more stable and reliable blower drive. 

This pulley is approximately 4" in diameter and 1.75" wide at the belt surface.  It is compatible with the original 8-rib belt used in the GM LT4 application as well as custom applications using a 10-rib belt.