This rear suspension package deal for the Challenger, Charger, Magnum and 300 includes a pair of rear trailing arms (track bars), rear upper lateral control arms (rear position) and rear upper lateral control arms (front position). For rear trailing arms (track bars), choose between: LX-201: Tubular Rear Trailing Arms (Track Bars) LX-204: Adjustable Rear Trailing Arms (Track Bars) For rear upper lateral control arms (rear position), choose between: LX-601: Tubular Rear Upper Lateral Control Arms (Rear Position) LX-604: Adjustable Rear Upper Lateral Control Arms (Rear Position) For rear upper lateral control arms (front position), choose between: LX-611: Tubular Rear Upper Lateral Control Arms (Front Position) LX-614: Adjustable Rear Upper Lateral Control Arms (Front Position)