ATI Super Damper SFI 18.1 Harmonic Balancer - 6.325 in OD - Black Oxide - Internal Balance - Crank Drive Mandrel - Small Block Chevy 23-FLT-NFO-XL Port exit dimensions: port exit

Port exit dimensions: port exit is 2

250 Diameter Rollers

Two 3/4 in NPT Inlets

Threaded aluminum bolt is 6" long with 1-1/8"-12 fine threads and is commonly used on big bar

ATI Super Damper SFI 18.1 Harmonic Balancer - 6.325 in OD - Black Oxide - Internal Balance - Crank Drive Mandrel - Small Block Chevy 23-FLT-NFO-XL Port exit dimensions: port exitThe patented ATI Super Damper is the only damper designed exclusively for high performance engines. Eliminates torsional crankshaft vibrations Exceeds SFI 18. 1 specs Laser engraved 360 timing marks Black zinc chromate finished Inner and outer shells are available in aluminum or steel contain the steel inertia weight. The inertia weight has six (2 ring design) or eight (3 ring design) computer machined grooves to retain the proper durometer O rings