ATI PERFORMANCE SUPER DAMPER Harmonic Damper [OUTER DIAMETER 7.48 18% OD | SHELL MATERIAL ALUM | RIBS 6] (2009-2010 CHRYSLER 5.7L HEMI) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS