ATI Super Damper The patented ATI Super Damper is the only crankshaft damper designed exclusively for high-performance Ford Turbo Barra engines. Includes crank bolt 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 Inner and outer shells are high-grade precision CNC machined 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). Installation NotesInterference Fit: Due to the precision machining, the hub is designed for a tight interference fit. You MUST heat the hub to 80°C (in boiling water or an oven) before installation to expand it slightly, allowing it to slide onto the crank snout without damage.Keyway Check: Ensure your crank keyway is in good condition. We recommend replacing the woodruff key during installation.Belt Alignment:Verify belt alignment with your accessories after installation to ensure the damper is fully seated.