ATI Super Damper is the same as found on 2012+ Ford Cobra/SCJ engines. Weighing in at a paltry 13 pounds, this new 8.1-inch damper application is a direct replacement for the stock OEM unit and features a 10-rib, 15% overdriven supercharger drive on the outer shell, as well as a removable OEM size 6-rib accessory pulley. ATI Super Dampers provide balanced dampening of torsional crankshaft vibrations through all RPM ranges and exceed SFI 18.1 Safety Certification for competition use. As with all ATI Dampers, the GT500 Damper is fully rebuildable and tunable.