Mopar 6.75 Super Damper 6.1L Hemi 6-Rib

The Mopar 6.75 Super Damper 6.1L Hemi 6-Rib from ATI Performance is engineered for serious engine builders and performance enthusiasts running Dodge and Chrysler's legendary 6.1L Hemi platform. This harmonic balancer is designed to control crankshaft oscillation and vibration at high RPM, a critical concern when pushing naturally-aspirated or forced-induction Hemi builds beyond factory limits. Whether you're building a track-focused muscle car, supercharged truck, or street monster, the right balancer protects your crankshaft and extends engine longevity under sustained performance conditions.

ATI's Super Damper series employs a 6-rib design that matches OEM belt geometry while reducing harmonic vibration through premium elastomer construction bonded to a heavy steel inertia ring. The 6.75-inch diameter provides optimal moment arm for counteracting first-order and second-order harmonics generated by the Hemi's aggressive valve timing and compression ignition event. The elastomer material absorbs energy across the RPM band, preventing the crankshaft nose from oscillating excessively and causing bearing wear, seal leakage, or catastrophic failure. This is particularly important when upgrading fuel systems, increasing boost pressure, or advancing timing curves beyond factory specification.

Installation is straightforward for any builder with basic engine knowledge—the 6-rib pulley bolts directly in place of the factory damper, requiring only a socket wrench and a damper puller tool. This balancer is fully compatible with all 6.1L Hemi platforms found in 2003–2010 Dodge Chargers, Challengers, Magnum, and Ram trucks, as well as Chrysler 300C models. Weighing 8.9 pounds with compact overall dimensions, it fits standard engine bays without clearance modifications. Recommended for any build exceeding 500 horsepower or sustained high-RPM operation above 7,000 RPM.