ATI 918486 Super Damper Harmonic Balancer for 2011-24 HEMI 5.7L/6.4L Dodge/Jeep

Vehicle Fitment

• 2011-2024 Chrysler 300 (5.7L & 6.4L HEMI)
• 2011-2024 Dodge Challenger & Charger (5.7L & 6.4L HEMI)
• 2011-2021 Jeep Grand Cherokee (5.7L & 6.4L HEMI)
• Also fits Durango and Commander models with 5.7L/6.4L HEMI where crank pulley matches this size

Features

• ATI Super Damper harmonic balancer engineered for 5.7L/6.4L HEMI engines
• 18% overdrive crank pulley increases accessory/supercharger drive speed
• SFI 18.1 certified for street and competitive applications
• Laser-etched 360° timing marks for accurate tuning reference
• Aluminum outer shell with steel inertia weight for strength and reduced mass
• 6-groove serpentine pulley fits factory belt systems
• Reduces torsional crankshaft vibration and improves drivetrain smoothness
• Rebuildable design for long-term serviceability and precision

Specifications

• Part Number: ATI 918486
• Application: 5.7L/6.4L HEMI VVT engines (Chrysler, Dodge, Jeep)
• Outer Diameter: 7.48 in (190 mm)
• Overdrive: 18% over stock crank pulley
• Pulley Grooves: 6-groove serpentine
• Engine Balance: Internal balance crankshaft configuration
• SFI Rating: 18.1 certified (performance & racing use)
• Finish: Black zinc chromate

Included Components

• 1x ATI 918486 Super Damper harmonic balancer
• 1x Laser-etched degree timing marks
• Installation instructions (where applicable)

Product Description

The ATI 918486 Super Damper Harmonic Balancer is a premium performance crankshaft damper built for modern HEMI V8 engines - specifically the 5.7L and 6.4L (392) found in Chrysler, Dodge, and Jeep performance models from 2011 through 2024. With a 7.48" diameter and 18% overdrive pulley, this damper is engineered to enhance accessory and supercharger drive performance while significantly reducing torsional vibration that can lead to crankshaft and accessory wear.

Constructed with an aluminum outer shell and strong steel inertia weight, the ATI Super Damper meets SFI 18.1 safety standards for both street and race use. Its laser-etched 360° timing marks provide precise reference points for ignition and tuning adjustments, and the 6-groove serpentine design maintains compatibility with factory belt systems. Ideal for performance enthusiasts upgrading their HEMI-powered muscle cars or SUVs, this damper improves drivability, response, and long-term engine reliability.