Build your own transmission? You'll find no better quality or value anywhere. Beware of inferior parts packaged in pretty boxes. These kits contain the parts we use everyday in our Comp and Super Comp transmissions. Performance Automatic assembled these kits from over 20 years of racing experience. A premium seal and gasket kit complemented with Kevlar bands, Alto or Raybestos racing clutches, bushings and various internal parts combine to give the winning edge round after round. These kits do not include valve body kits. You must order separately if desired