Aluminum straight back LEFT upright CNC-machined from premium Swiss 7075 T6 aluminum. Designed & appropriate utilized in high-traction conditions. Increases back security. Features additional top roll center roles for fine tuning. Roll center height is modified making use of shims between upright and top url. Wheelbase range is increased and might be modified within an array of 4mm. Besides black colored colored coated and laser engraved.