ATI Performance Products, Inc. is proud to introduce its Super Damper® for LS9 engines including the new 2009 Supercharged Corvette ZR1. ATI offers the OEM replacement sized damper (P/N 918634) along with the overdrive damper. The overdrive damper (P/N 918624) for the LS9 small-block, V-8 engine is designed with a 14% overdrive and is bolted in the OEM location. Factory dampers and non-dampened pulleys offer no protection to modified engines that produce more HP than stock. The ATI Super Damper® provides balanced dampening of torsional crankshaft vibrations through all RPM ranges. This damper exceeds SFI 18.1 Safety Certification, for competition use.