SBF 6.325 Harmonic Damper - SFI

The SBF 6.325 Harmonic Damper - SFI by ATI Performance is a precision-engineered crankshaft accessory designed for Small Block Ford engines running high RPM and nitrous applications. Built to meet SFI Foundation specifications, this damper effectively eliminates destructive harmonic vibrations that can crack cranks, damage bearings, and reduce engine reliability. It is essential for anyone building a street performance engine, bracket racing competitor, or forced induction platform.

ATI's harmonic damper features an elastomer-bonded design that isolates and absorbs vibration frequencies across the entire RPM band, protecting your crank from fatigue failure. The damper's diameter of 6.325 inches is specifically engineered for compatibility with Small Block Ford engines, while the SFI certification ensures it meets rigorous dynamic balancing and structural integrity standards required by sanctioning bodies. This construction maintains accurate crankshaft timing and balancing, preventing harmonic spikes during heavy throttle transitions.

This damper is particularly beneficial for serious small block builds where reliability is as crucial as performance, especially in nitrous, turbo, or supercharged applications. At 11 lbs, it provides effective vibration control without adding excessive rotational mass, making it critical for sustained operation at 6,500+ RPM or under boost. The SBF 6.325 Harmonic Damper is a must-have for any performance enthusiast looking to enhance engine longevity and power delivery.