ATI Damper 5.67in Aluminum 6 Groove 15% Underdrive 1Pc (20112024 Dodge Challenger / Charger 5.7L & 6.4L HEMI) ATI918487
5.67in Aluminum 15% Underdrive Super Damper for 20112024 Dodge Challenger & Charger 5.7L / 6.4L HEMI
The ATI 5.67-inch Aluminum Super Damper (part ATI918487) delivers maximum efficiency and precision balance for 20112024 Dodge Challenger and Charger 5.7L & 6.4L (392) HEMI engines. With a 15% underdrive pulley ratio and lightweight 1-piece aluminum construction, this damper reduces accessory load, freeing up horsepower and improving throttle response. Designed for performance street cars and track builds, it provides world-class harmonic control, vibration reduction, and reliability backed by SFI 18.1 certification.
Performance Highlights
- 5.67-inch outer diameter provides compact fitment and rapid throttle response
- 15% underdrive pulley decreases accessory drag for improved power output
- Lightweight 1-piece aluminum construction reduces rotational mass
- 6-groove pulley supports factory serpentine belt systems
- Ideal for street and track performance builds using 5.7L or 6.4L HEMI engines
- SFI 18.1 certified for sanctioned motorsport competition
- Fully rebuildable for long-term, repeatable performance
Quick Specs
- Outer Diameter: 5.67 inches
- Material: Aluminum
- Pulley Type: 6 Groove
- Drive Ratio: 15% Underdrive
- Design: 1-Piece Super Damper
- Certification: SFI 18.1
- Applications: Dodge 5.7L & 6.4L (392) HEMI Engines
- Part Number: ATI918487
Why Choose ATIs 15% UD Super Damper for HEMI Engines?
The ATI918487 provides measurable performance gains by reducing accessory drag while maintaining smooth, vibration-free operation. Ideal for high-RPM or boosted HEMI builds, this damper ensures crankshaft stability and prevents power loss due to torsional vibration. Its precision-machined billet aluminum design and SFI 18.1 certification make it the trusted choice for serious performance enthusiasts and professional tuners alike.
Frequently Asked Questions
Whats the benefit of a 15% underdrive damper?
It slows accessory speeds by 15%, reducing parasitic loss and freeing up horsepower while maintaining reliable charging and cooling performance.
Does this damper work with stock accessories?
Yes. The ATI918487 maintains factory belt alignment and supports OEM accessory systems for an easy bolt-on installation.
Can it be used on supercharged applications?
Yes. While most suited for naturally aspirated builds, it can also support mild forced-induction setups where accessory speed reduction is beneficial.
Is this damper rebuildable?
Yes. All ATI Super Dampers are fully rebuildable for long-term performance and reliability.
Vehicle Fitment
- 2011 Dodge Challenger R/T 5.7L HEMI
- 2012 Dodge Challenger R/T 5.7L HEMI
- 2013 Dodge Challenger R/T 5.7L HEMI
- 2014 Dodge Challenger R/T 5.7L HEMI
- 2015 Dodge Challenger R/T 5.7L HEMI
- 2016 Dodge Challenger R/T 5.7L HEMI
- 2017 Dodge Challenger R/T 5.7L HEMI
- 2018 Dodge Challenger R/T 5.7L HEMI
- 2019 Dodge Challenger R/T 5.7L HEMI
- 2020 Dodge Challenger R/T 5.7L HEMI
- 2021 Dodge Challenger R/T 5.7L HEMI
- 2022 Dodge Challenger R/T 5.7L HEMI
- 2023 Dodge Challenger R/T 5.7L HEMI
- 2024 Dodge Challenger R/T 5.7L HEMI
- 2011 Dodge Challenger SRT8 6.4L
- 2012 Dodge Challenger SRT8 6.4L
- 2013 Dodge Challenger SRT8 6.4L
- 2014 Dodge Challenger SRT8 6.4L
- 2015 Dodge Challenger SRT 392 6.4L
- 2016 Dodge Challenger SRT 392 6.4L
- 2017 Dodge Challenger SRT 392 6.4L
- 2018 Dodge Challenger SRT 392 6.4L
- 2019 Dodge Challenger SRT 392 6.4L
- 2020 Dodge Challenger SRT 392 6.4L
- 2021 Dodge Challenger SRT 392 6.4L
- 2022 Dodge Challenger SRT 392 6.4L
- 2023 Dodge Challenger SRT 392 6.4L
- 2024 Dodge Challenger SRT 392 6.4L
- 2011 Dodge Charger R/T 5.7L HEMI
- 2012 Dodge Charger R/T 5.7L HEMI
- 2013 Dodge Charger R/T 5.7L HEMI
- 2014 Dodge Charger R/T 5.7L HEMI
- 2015 Dodge Charger R/T 5.7L HEMI
- 2016 Dodge Charger R/T 5.7L HEMI
- 2017 Dodge Charger R/T 5.7L HEMI
- 2018 Dodge Charger R/T 5.7L HEMI
- 2019 Dodge Charger R/T 5.7L HEMI
- 2020 Dodge Charger R/T 5.7L HEMI
- 2021 Dodge Charger R/T 5.7L HEMI
- 2022 Dodge Charger R/T 5.7L HEMI
- 2023 Dodge Charger R/T 5.7L HEMI
- 2024 Dodge Charger R/T 5.7L HEMI
- 2012 Dodge Charger SRT8 6.4L
- 2013 Dodge Charger SRT8 6.4L
- 2014 Dodge Charger SRT8 6.4L
- 2015 Dodge Charger SRT 392 6.4L
- 2016 Dodge Charger SRT 392 6.4L
- 2017 Dodge Charger SRT 392 6.4L
- 2018 Dodge Charger SRT 392 6.4L
- 2019 Dodge Charger SRT 392 6.4L
- 2020 Dodge Charger SRT 392 6.4L
- 2021 Dodge Charger SRT 392 6.4L
- 2022 Dodge Charger SRT 392 6.4L
- 2023 Dodge Charger SRT 392 6.4L
- 2024 Dodge Charger SRT 392 6.4L
Contact Beefcake Racing
Beefcake Racing offers the complete line of ATI Super Dampers for all modern HEMI applications. For expert fitment help or to order, email sales@beefcakeracing.com or call 1-855-827-7223. Our performance team can help you pick the right damper for your Challenger or Charger build.
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