ATI Performance Products 918620 - LS7 Corvette w/ A/C, OE Size

• Corvette LS7 (with A/C) • Aluminum Shell/Steel Crankshaft Hub • 7.43" OD • Internal Balance • 8-Rib The patented ATI Super Damper is the only crankshaft damper designed exclusively for high performance Chevy engines. • Eliminates torsional crankshaft vibrations • Exceeds SFI 18.1 specs • Black zinc chromate finished • OEM equipment on ZZ572 GM Crate Engines • Tunable, rebuildable, and extremely efficient at ALL RPM • Laser engraved timing marks Inner and outer shells are available in aluminum or steel, and contain a steel inertia weight. This 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).