Straight-Rail Full Frames. Intended for pro-touring, g-machine, and street car or truck applications. Features stout 4x2" .120"-wall, boxed-tubing frame. Front suspension consists of Chassisworks g-Machine double-A-arm and rack-and-pinion system. Rear suspension choices Perfect Steerable Transfer Cartlude canted 4-link, torque arm, IRS, parallel 4-link or ladder bar systems.