SBC Harmonic Damper 6-3/4 Int. Balance

The SBC Harmonic Damper 6-3/4 Int. Balance from SCAT ENTERPRISES is a precision-engineered crankshaft damper designed specifically for small-block Chevrolet engines. This internally balanced damper is an essential upgrade for any serious engine builder or performance enthusiast looking to reduce harmonic vibration and extend engine longevity.

Built to OEM specifications, the damper absorbs torsional vibrations that naturally occur during combustion cycles, protecting your crank and reducing strain on bearings and seals. SCAT's internal balancing design positions the counterweight and rubber ring inside the damper housing, eliminating the need for external balance weight modifications. The 6-3/4-inch diameter damper provides optimal mass distribution for SBC applications, effectively dampening harmonic frequencies across the RPM range.

This damper uses elastomer isolation technology—a vulcanized rubber ring sandwiched between the inner hub and outer ring—to convert vibration energy into heat dissipation. The result is smoother engine operation, reduced stress on connecting rods and main bearings, and improved crankshaft durability in both street and competition builds. This damper is ideal for engine builders upgrading from worn or undersized factory dampers, particularly when pairing a stroker crank or modifying displacement on SBC platforms.