ATI Pontiac 7" Internal Balance 3-Bolt Damper/Balancer ATI-917160

Steel Shell/Steel Crankshaft Hub 7.074" OD Internal Balance Chevy Front 3-Ring .0135" thicker than stock *Pulley Mounting Surface is .200" further OUT than stock*(Uses Pulley #RAR-PUC-4AC for v-belt but will have to re-space brackets and accessories to account for the .200" difference in damper face The 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 (dyno tested for each application).