ATI PERFORMANCE SUPER DAMPER Harmonic Damper [STEEL SHELL | 7.074 OD | 3 RING | TOTAL WEIGHT 15.4 LBS | INERTIA WEIGHT 7.6 LBS] (GM LS1) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS