UMI's G-Body Pro-Tour style bar is a true multi purpose high  performance rear sway bar. The chassis and differential housing mounts reduce  bind normally associated with the factory style bars. The bars are 1"  diameter hollow and feature three different rates (street/auto-x, road  race/strip). UMI's tried and true CNC machined clamping system allows  differential housing mounting on 2.75", 3" and 3.25" diameter  housings. These can be bolted on, or welded for additional security. The double  shear chassis mounts are held in place by four 3/8" fasteners. Drilling  through the crossmember is required and a template /instructions are included.  The house made hex adjuster allows pre-loading of the bar when used for drag  applications so your car leaves straight. Choose the longest hole for street,  middle hole for auto-x, road race and the shortest hole for drag use.