ATI PERFORMANCE SUPER DAMPER Harmonic Damper [OUTER DIAMETER 7.425 | WEIGHT 9.75 LBS | SHELL MATERIAL STEEL | GROOVES 6 | 4 RIB REAR A/C PULLEY | HUB MATERIAL STEEL] (2005-2006 Chevrolet SSR, 2006-2009 Trailblazer SS & 2007-2013 GM Truck & SUV V8) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS