Aluminum straight back RIGHT upright CNC-machined from premium Swiss 7075 T6 aluminum. Designed & appropriate in high-traction conditions. Increases straight back protection. Features extra top roll center jobs for fine tuning. Roll center height might modified using shims between upright and top hyperlink. Wheelbase range is increased and could be modified within a selection of 4mm. Furthermore black colored colored colored colored colored coated and laser etched.