ATI PERFORMANCE SUPER DAMPER Harmonic Damper [OUTER DIAMETER 7.53 (OEM) | WEIGHT 9.75 LBS | SHELL MATERIAL STEEL | RIBS 6 | 4 RIB REAR PULLEY | HUB MATERIAL STEEL] (GM LS) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS