The Scion xB Weapon R Trunk Cage was designed to eliminate any body roll from the car. Made of Billet 7075 Aluminum to ensure strength, weight savings and durability. This Rear Cage ties all the most rigid points of the car together to obtain a SUPER RIGID CHASSIS. It is CNC Machined and then TIG Welded for strength and finally Polished to a show quality shine. So if you're heavily into Road Racing or Drag Racing this is the only Cage Bar you will ever need!