DMS 100mm LSA/LS9 Supercharger Idler Pulley Maximize belt wrap and ensure consistent boost with the DMS 100mm Supercharger Idler Pulley. Designed for LSA and LS9 supercharger systems, this pulley is a crucial upgrade when using smaller upper pulleys, preventing belt slippage and maintaining optimal performance. Key Features and Benefits: Increased Belt Wrap: 100mm diameter increases belt wrap compared to the factory 90mm idler, reducing belt slippage and ensuring consistent boost. High-Quality Construction: CNC machined from 6061 billet aluminum for exceptional strength and durability. Durable Finish: Black anodized finish provides corrosion resistance and a sleek appearance. High-Speed Bearings: Equipped with Italian-made high-speed bearings and Spirolox bearing retainers for optimal performance and balance at high RPMs. Easy Installation: Includes two bearing spacers designed for use with the factory bolt, simplifying installation. Wide Belt Compatibility: 42mm width allows for the use of up to an 11-rib belt. Universal Fitment: Pulley offset is compatible with both LSA and LS9 supercharger belt drive systems. Kit Includes: 100mm Billet Aluminum Idler Pulley (2) Bearing Spacers Fitment: LSA Supercharger Systems LS9 Supercharger Systems Installation: Direct replacement installation using the factory bolt. Idler Pulley Install Guide