ATI 918487 Super Damper -15% Underdrive for 11-23 Dodge 5.7L & 6.4L Hemi Engines

Vehicle Fitment

• 2011-2023 Dodge Charger (5.7L & 6.4L V8 Hemi, underdrive)
• 2011-2023 Dodge Challenger (5.7L & 6.4L V8 Hemi, underdrive)
• 2011-2023 Dodge 300 (5.7L & 6.4L V8 Hemi, underdrive)
• 2011-2023 Jeep Grand Cherokee (5.7L & 6.4L V8 Hemi, underdrive)
• 2011-2023 Dodge Durango and Jeep Commander (5.7L & 6.4L V8 Hemi, underdrive)

Fitment Notes

• 15 % underdrive harmonic balancer designed for vehicles with VVT-controlled 5.7L & 6.4L Hemi engines.
• Compatible with ATI GM-front crank hubs and most Mopar crankshaft setups using OEM bolt pattern.
• Not compatible with 2013 Ram 1500 unless reverse-fit listed under alternate part number.

Features

• Exceeds rigorous SFI 18.1 safety specs for performance dampers.
• Constructed with aluminum outer shell and laser-engraved 360° timing marks.
• Rebuildable with tunable inertia weights--ideal for both street and racing applications.
• Acts as OEM for 392 Mopar Crate Engines, bringing proven reliability to factory and aftermarket builds.

Specifications

• Part Number: 918487
• Engine Compatibility: 5.7L & 6.4L Hemi V8 with VVT (2011-2023)
• Underdrive: ~15 % smaller outer diameter than stock
• SFI Rating: SFI 18.1
• Material: Aluminum shell with steel inertia mass

Included Components

• 1x ATI Super Damper harmonic balancer (underdrive design)
• N/A: does not include hub, bolts, or installation hardware

Product Description

ATI's 918487 Super Damper is a high-performance harmonic balancer offering ~15 % underdrive tailored to 2011-2023 vehicles equipped with 5.7L and 6.4L Hemi V8 engines (with VVT). Engineered to exceed SFI 18.1 standards, this balancer combines a forged aluminum shell with a precision-machined steel inertia mass and laser-engraved 360° timing marks.

Perfect for both street and strip, it maintains factory crank hub compatibility, is rebuildable with tunable weights, and even serves as OEM on 392 Mopar crate engines. Note: some platforms like the 2013 Ram 1500 may require a different part number--always confirm fit before purchase.