BBM 7.074 Harmonic Damper - SFI

The ATI Performance BBM 7.074 Harmonic Damper with SFI 18.1 certification is a precision-engineered crankshaft damper designed for high-performance Mopar B-series and RB-series engines, including the 426 Hemi. This aluminum and steel construction damper measures 7.074 inches in outer diameter and is configured for internal balance applications, making it compatible with late-model Mopar big-block powerplants. SFI 18.1 certification ensures this damper meets sanctioning body standards for drag racing, circle track, and other competition environments where crankshaft harmonic control is critical to engine reliability.

Harmonic dampers absorb torsional vibration generated by the crankshaft during combustion cycles, reducing stress on the crank and extending engine longevity. The ATI damper's dual-elastomer design isolates the inertia ring from the hub, effectively decoupling these vibrations before they propagate through the rotating assembly. The black finish resists corrosion and provides a professional appearance on engine bays. At 7.55 pounds, this damper carries sufficient inertia to manage the high-RPM demands of serious Mopar performance builds without imposing excessive rotating mass on the crankshaft.

This component is essential for builders and racers running Mopar B-block or RB-block engines at elevated power levels. Whether you're assembling a street performance engine, prepping for bracket racing, or building a dedicated competition platform, the ATI BBM 7.074 provides the harmonic control and SFI certification required by most sanctioning bodies. The internal-balance configuration matches factory Mopar applications, ensuring straightforward installation without requiring accessory mounting modifications or external balance weights.

ATI Performance is recognized for producing OEM-quality dampers and rotating components trusted by professional engine builders and OEMs. Verify internal-balance compatibility with your specific engine block and crankshaft configuration before ordering, as balance method mismatches can cause severe vibration and premature bearing wear.