Cometic C5980-70HNBR ATI 6" Damper O-Ring Rebuild Kit 3-Ring Design HNBR

The Cometic C5980-70HNBR is a complete O-ring rebuild kit designed specifically for ATI 6-inch harmonic dampers with 3-ring configurations. This kit provides everything needed to restore proper damping function to worn ATI Super Dampers, ensuring optimal crankshaft vibration control and extended engine life.

Key Features:

• Premium HNBR (Hydrogenated Nitrile Butadiene Rubber) O-rings for superior performance
• 70 durometer rating provides optimal sealing and damping characteristics
• 3-ring design for 6-inch diameter ATI dampers
• Complete kit includes all necessary O-rings for full damper rebuild
• Enhanced heat resistance up to 300°F compared to standard nitrile
• Excellent resistance to petroleum oils, fuels, and automotive fluids
• Superior ozone, chemical, and abrasion resistance for extended service life
• Direct replacement for ATI part number 918980-70HNBR

HNBR material offers significant advantages over standard rubber elastomers, including exceptional resistance to heat, chemicals, and mechanical wear. This makes it ideal for high-performance and racing applications where dampers are subjected to extreme temperatures and operating conditions. The 70 durometer rating represents the standard hardness for most harmonic dampers, providing the proper balance between sealing capability and vibration damping performance.

Regular inspection and rebuilding of harmonic dampers is critical for racing and high-performance engines. Worn or cracked elastomers can lead to damper failure, resulting in severe crankshaft damage from uncontrolled harmonic vibrations. This rebuild kit allows you to maintain your ATI damper at a fraction of the cost of replacement, ensuring reliable protection for your engine's crankshaft.