Arnott’s new adjustable air suspension system for the harley-davidson softail ® has been custom designed for the softail frame to provide the rider with superior control, ride comfort and height adjustability.The kit, featuring arnott’s truair technology, includes a rugged air spring bladder and is not an air cylinder or air-assisted unit.Arnott includes a powerful compressor and black anodized cover which attaches to the regulator rectifier to hide and protect the compressor.