ATI PERFORMANCE SUPER DAMPER Harmonic Damper [OUTER DIAMETER 6.78 6% OD | SHELL MATERIAL ALUM | RIBS 6 | HUB MATERIAL STEEL] (2011-2020 CHRYSLER 5.7L & 6.4L HEMI) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS