RRD/GDM Extreme Race Harmonic Damper Kit - M50/S50/M52/S52/M54

Proven race damper kit configured for the M5X Engine, designed to be the lightest and strongest race hub damper kit we can make for the M5X engines: -Heat-treated 4140 Hub with correct interference fit -ARP 8740 and Grade 12.9 hardware -4140 high-strength, 60-2 trigger wheel front mountt crank signal option -6061 black anodized aluminum serpentine pulley We have redesigned and made improvements to both the trigger wheel and the hub. Designed to be compatible with dampers from multiple manufacturers, including 7" 3-ring design. Meant for high-revving and high power M5X engines. Not AC compatible.