ATI Racing Harmonic Balancer - LS7 918620

ATI Performance Products 918620 For LS7 427 Engine Balance: Internal Safety Rating: SFI 18.1 Degree Markings: Yes Degree Marking Range: 360 Outside Diameter (in): 7.530 in. Harmonic Balancer Material: Aluminum Harmonic Balancer Construction: Elastomer Harmonic Balancer Finish: Black anodized Mounting Hardware Included: No Notes: Damper weighs 6.85 lbs. Features 8-rib pulley with 4-rib a/c pulley. Super Damper® Harmonic Dampers   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 Tunable, rebuildable, and extremely efficient at ALL RPM Laser engraved 360° timing marks The ATI Serpentine Super Damper contains grooves for serpentine belts machined into the outer damper shell. The dampers come standard with 6 outer grooves for standard OEM drive systems. 8 & 10 grooves are available for supercharger or turbo applications. Serpentine dampers are available in a variety of diameters. Crank hubs may be fitted with a 6 groove serpentine pulley to drive external oil pumps or vehicle accessories. The Serpentine Series dampers fit all ATI GM-front crank hubs and can be adapted to many engine combinations providing maximum flexibility. These dampers are available in steel or lightweight hard-coated aluminum and come with laser engraved 360° timing marks. Exceeds SFI 18.1 spec