KITS BUILT TO ORDER - 4-6 Weeks Please call for Ratios in stock - Limited Ratios Available This kit is geared towards Performance enthusiasts seeking 0 belt slip, and true die-hard's who love the classic sound and style of the old GMC Gilmer drive blowers.Note: NOT Compatible with 2650 Superchargers Features: Double shear idler pulley mounting greatly reducing idler pulley axle flexing. zero belt slip Supports up to 12 different overdrive pulley combinations Supports both standard deck and tall deck applications including blocks with manifold spacers. Compatible with our Corvette Spacing High Mount A/C and Alternator and Power Steering Bracket Kits What's Included: Billet Aluminum Upper and Lower LSA Gilmer Pulleys in selected overdrive ratio Idler Pulley and double shear plates and mounting brackets (with attachment hardware) 8MM HTD 50MM Wide Drive Belt Installation Requirements (NOT INCLUDED IN KIT)The following items are required to install the LSX Concepts LSA Gilmer Drive Kit but can be purchased separately Factory LSA Supercharger 918859 ATI Super Damper LINGENFELTER 10 Bolt Pulley Hub LSA/LS3 Water Pump Corvette Offset accessory drive system Resources Instructions - Click here Proudly Made in The USA....