Protect the rotating assembly of your 6.2L Supercharged Gen 3 HEMI with the ATI 918483 Super Damper. Developed specifically for the Hellcat engine platform, this performance harmonic balancer is designed to control torsional crankshaft vibrations throughout a wide range of engine speeds and driving conditions. While an OEM damper is optimized around expected factory operating conditions, ATI engineered its Super Damper for the broader demands associated with street performance and racing.

Part number 918483 uses an 8.18-inch OEM diameter, making it an important option for builders who want upgraded harmonic control without changing the lower pulley drive ratio. ATI also offers the 918485 at 8.90 inches with 10 percent overdrive, but 918483 retains the OEM-size configuration. It incorporates 10-rib and 6-rib drive surfaces for the supercharger and accessory systems.

Construction combines an aluminum damper shell with a steel hub. ATI’s elastomer-based Super Damper design is engineered to control crankshaft harmonics across the RPM range and can be tuned and rebuilt as the engine combination changes or the damper requires service. The aluminum shell is hard anodized, and ATI uses computer-controlled laser-engraved timing marks on its Super Dampers.

This makes the 918483 particularly valuable for modified Gen 3 HEMI combinations. Upper supercharger pulley upgrades, increased boost, performance camshafts, ported superchargers, E85 conversions, and other horsepower modifications can increase the demands placed on the engine. A performance damper provides an additional layer of protection for the crankshaft and rotating assembly while supporting the broader operating range of a modified engine.

Fitment covers 2015 and newer 6.2L Supercharged HEMI applications, with ATI specifically listing Hellcat Challenger, Charger, Trackhawk, 2018 Demon Challenger, and 2023 Demon 170 Jailbreak applications. Exact fitment should still be verified when working with modified accessory drives or custom supercharger configurations.

Installation requires additional attention because the factory Hellcat crankshaft does not have a keyway, while the ATI damper does. ATI strongly recommends pinning the crankshaft and offers its 918008-1 Crank Pin Drill Kit for this purpose. ATI also requires a new crankshaft bolt during installation and specifies tightening it to 240 ft-lbs with Loctite. **Both are listed on this page as ad ons so if you don’t have these already, you will need them!**

For Hellcat-based Gen 3 HEMI owners who want stronger harmonic control while retaining an OEM-diameter lower pulley, the ATI 918483 Super Damper is a proven performance solution. Its rebuildable construction, SFI certification, direct-fit design, and performance-focused engineering make it well-suited for everything from street cars to serious high-horsepower builds.

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Specifications & Features

• Brand: ATI Performance Products
• Manufacturer Part Number: 918483
• Product Type: Super Damper / Harmonic Balancer
• Engine Compatibility: 6.2L Supercharged Gen 3 HEMI
• Vehicle Compatibility: Select Dodge Challenger SRT Hellcat, Dodge Charger SRT Hellcat, Dodge Challenger SRT Demon, Jeep Grand Cherokee Trackhawk, and Dodge Challenger SRT Demon 170 applications
• Year Compatibility: 2015 and newer, application dependent
• Outer Diameter: 8.18 inches
• Drive Ratio: OEM / Stock Diameter
• Overdrive: No
• Belt Grooves: 10-rib and 6-rib
• Shell Material: Aluminum
• Hub Material: Steel
• Hub Part Number: 916278
• Weight: Not specified in ATI’s current application chart
• Color / Finish: Hard-anodized aluminum shell / metallic components
• SFI Certification: Exceeds SFI 18.1 specifications
• Tunable: Yes
• Rebuildable: Yes
• Timing Marks: Laser engraved
• Designed to control torsional crankshaft vibrations throughout the RPM range
• Direct-fit replacement for compatible factory 6.2L HEMI dampers
• Maintains OEM lower pulley diameter
• Suitable for street and racing applications
• Suitable for stock and modified supercharged Gen 3 HEMI engines
• Crank Pinning: Strongly recommended by ATI
• Recommended Pinning Tool: ATI 918008-1 Drill Pin Fixture Kit
• New Crank Bolt Required: Yes
• Crank Bolt Torque: 240 ft-lbs
• Loctite Recommended: Yes
• Intended Use: Factory damper replacement, high-horsepower builds, upper pulley combinations, street performance, drag racing, and supercharged Gen 3 HEMI engine builds
• Installation Difficulty: Advanced
• Professional Installation: Recommended
• Fitment Note: Verify compatibility with your exact engine, accessory drive, and supercharger configuration before ordering