ATI Super Damper SFI 18.1 Harmonic Balancer - 6.325 in OD - Black Oxide - Internal Balance - Small Block Chevy 917781 BR30022 This is due to the

This is due to the trigger signal not being strong enough to trigger both the MSD and the factory's components

Built in drain plug in front center of bowl provides easy access to empty contents of bowl

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but will increase engine vibration transmission significantly

ATI Super Damper SFI 18.1 Harmonic Balancer - 6.325 in OD - Black Oxide - Internal Balance - Small Block Chevy 917781 BR30022 This is due to theATI Super Damper has become one of the industry's standards in harmonic vibration control, combining two dampening surfaces in one unit. At 6000 RPM, digital vibration tests proved the ATI Super Damper to be 30% more effective than original equipment style dampers. ATI Super Damper consists of an outer shell, inner shell, crankshaft hub, and eight individual elastomers. Reductions in torsional vibrations provide increased horsepower while improving