Description
Harmonic vibration can destroy your Small Block Chevy engine from the inside out—metal fatigue, bearing wear, and catastrophic failure happen silently until it’s too late. The ATI SBC 7in Harmonic Damper SFI 917780 absorbs these destructive oscillations with precision-engineered elastomer dampening, protecting your crankshaft and extending engine life under high-RPM racing conditions. SFI-certified for competition use, this is the reliability upgrade that separates engines that last from those that don’t.
- 7.074 in OD
- Internal balance design
- SFI 18.1 certified
- Steel construction
- Small Block Chevy fitment
- Bolt-on installation
- Black finish
- Sold individually






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