SBC LS1/LS6 Harmonic Damper - SFI

The Professional Products SBC LS1/LS6 Harmonic Damper with SFI certification is a precision-engineered crankshaft component designed for GM LS-series engines requiring internal balance and superior vibration dampening. This damper is essential for high-performance applications where engine longevity and reliability are critical.

With a 7.500-inch outer diameter, this harmonic balancer features SFI 18.1 certification, ensuring it meets strict performance standards. Constructed from durable steel with a black finish, it effectively absorbs and dissipates vibration frequencies generated during combustion cycles, protecting the crankshaft from harmful torsional stress.

Engine builders and performance enthusiasts working with LS-series platforms will find this damper particularly beneficial for street applications, weekend track use, or marine powerplant installations. Its internal balance design eliminates the need for external balancing hardware, making it a critical upgrade for those modifying intake manifolds, fuel injection systems, or cylinder heads.