ATI Performance is well known for the improved harmonic damper best used for supercharger or any forced induction applications. Here at Beefcake Racing we use them on all our builds to help control excessive engine vibrations. AT Performance manufactures a multitude of high performance parts including competition transmissions such as the incomparable Superglide, Treemaster Converters, Super Dampers, Compu-Flow Valve Bodies, Flexplates and Adapter Kits as well as a wide variety of performance enhancing internal transmission components. ATI proudly holds over a dozen U.S. Government patents, with others pending. Beefcake Racing is an Authorized Dealer for ATI Performance, call 1-855-827-7223 for guaranteed lowest prices.