LS Accessory Drive Bracket Installation Kit for Standard (Short) Alignment Installation Kit, LS Acc Drive Brackets, Use with Standard Belt Alignment (alignment Common on Corvette, CTS-V, & G8) HolleyInstallation Kit, Ls Acc. Drive Brackets, use with Standard belt alignment (Short alignment common on Corvette, Cts V, & G8) Holley accessory drive installation kits provide proper spacing for Holley A C, P S & Alt accessory drive brackets, so belts ride at the perfect distance on your particular engine. A Fitment And Required Components Guide helps you locate and source components and provides other notes and helpful hints to figure your distance.