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ATI 917777

Super Damper GM LS1

ATI 917777

Part Number: 085-917777

Super Damper
  • GM LS1
  • Steel Shell/Steel Crankshaft Hub
  • 7.074" OD
  • 1.483" Crankshaft
  • Internal Balance
  • 2.280" Counterbore
  • 3-Ring
  • $407.99
    Made In USA
    FREE Shipping
    ATI 917777 Super Damper GM LS1 $407.99

    ATI 917777 Details

    Chevy Steel Dampers

    Hubs for these assemblies have a 2.280'' counterbore. A standard length crank bolt is used and the mandrel bolts to the 3 pulley mounting holes. This eliminates the 4''-6'' long bolt that is ineffective in retaining torque. Adapter part number 085-916321 is available for existing mandrels with 1.245'' pilot.


    Mounting Hardware Included
    Engine Balance
    Degree Markings
    Safety Rating
    SFI 18.1
    Harmonic Balancer Construction
    Harmonic Balancer Finish
    Black zinc chromate
    Harmonic Balancer Material
    Sold individually
    Outside Diameter (in.)
    Degree Marking Range
    Manufacturer's Part Number:

    ATI's patented Super Damper is the only harmonic balancer developed exclusively for high-RPM performance engines (6000+ RPM). Its proven elastomer design is 2-in-1: a 4" diameter damper and a 7" diameter damper in two shells that bolt to the crank hub.

    Inner and outer shells are aluminum or steel to contain the steel inertia weight. The inertia weight has eight computer-machined grooves to retain the proper durometer O-rings (installed at ATI and dyno tested for each application). O-ring life has been tested in Winston Cup competition over two million cycles and in drag racing engines for 10 years (exceeds SFI 18.1 specs). Units can be rebuilt by installing new O-rings. Shells have a black zinc chromate finish with computer-controlled, laser-engraved 360° timing marks.

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