ATI PERFORMANCE SUPER DAMPER Harmonic Damper [OUTER DIAMETER 6.78 (10% UD) | WEIGHT 7.9 LBS | SHELL MATERIAL ALUM | GROOVES 6 & 4 | 4 RIB REAR A/C PULLEY | HUB MATERIAL STEEL] (2010-2015 Camaro LS3 & 2007-2013 GM Truck & SUV V8) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS