Supercharger Idler Pulley

Extreme-Duty, Double-Bearing Design

For LSA Applications, including 2009-2015 Cadillac CTS-V, 2012-2015 Camaro ZL1

This 100mm billet idler pulley is designed to replace the factory 90mm idler pulley located directly beneath and to the left of the supercharger 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 underhood 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 LSA application as well as custom applications using a 10-rib belt.