Aluminum straight back LEFT upright CNC-machined from premium Swiss 7075 T6 aluminum. Designed & appropriate found in high-traction conditions. Increases straight back security. Features extra top roll center functions for fine tuning. Roll center height is modified utilizing shims between upright and top url. Wheelbase range is increased and might be modified within a variety of 4mm. Besides black colored colored colored colored coated and laser etched.