ATI Damper 7.48in Aluminum 6 Groove 18% Overdrive 3 Ring (20112024 Dodge Challenger / Charger 5.7L & 6.4L HEMI) ATI918486
7.48in Aluminum 18% Overdrive Super Damper for 20112024 Dodge Challenger & Charger 5.7L / 6.4L HEMI
The ATI 7.48-inch Aluminum Super Damper (part ATI918486) is designed for high-performance 5.7L and 6.4L (392) HEMI engines found in 20112024 Dodge Challenger and Charger models. Featuring a 6-groove pulley and 18% overdrive configuration, this damper increases accessory and supercharger drive speed for improved boost response and power output. Built from lightweight billet aluminum and SFI 18.1 certified, it offers world-class harmonic control, reduced vibration, and long-term reliability for street and race builds alike.
Performance Highlights
- 7.48-inch outer diameter enhances accessory and blower drive efficiency
- 18% overdrive pulley delivers more boost and faster response for forced-induction setups
- 6-groove design supports factory-style belt systems
- 3-ring aluminum inertia assembly for superior torsional damping and balance
- Lightweight billet aluminum construction reduces rotational mass
- SFI 18.1 certified for motorsport-level safety compliance
- Fully rebuildable for long-term accuracy and performance consistency
Quick Specs
- Outer Diameter: 7.48 inches
- Material: Aluminum
- Pulley Type: 6 Groove
- Drive Ratio: 18% Overdrive
- Design: 3-Ring Super Damper
- Certification: SFI 18.1
- Applications: Dodge 5.7L & 6.4L (392) HEMI Engines
- Part Number: ATI918486
Why Choose ATIs 18% OD Super Damper for Modern HEMI Engines?
The ATI918486 Super Damper is ideal for HEMI-powered muscle cars running superchargers or high-RPM performance builds. The 18% overdrive ratio increases blower speed and improves torque delivery, while the precision-machined aluminum construction ensures smoother operation and reduced crankshaft stress. Perfect for street-driven performance cars or competition builds, this damper offers proven strength and balance under extreme power conditions.
Frequently Asked Questions
What does 18% overdrive mean?
The pulley is 18% larger than stock, increasing the speed of driven accessories or superchargersideal for added boost or higher alternator output.
Can this damper be used with a supercharger?
Yes. Its commonly used in ProCharger, Whipple, and Magnuson supercharged HEMI builds for improved boost control and belt traction.
Is it safe for street use?
Absolutely. While engineered for performance, the ATI918486 delivers OEM-level smoothness and reliability for daily-driven vehicles.
Is this damper rebuildable?
Yes. The ATI918486 is fully rebuildable using ATI service parts, maintaining long-term precision and balance.
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 carries the complete line of ATI Super Dampers and modern HEMI performance parts. For fitment support or to order, email sales@beefcakeracing.com or call 1-855-827-7223. Our experts can help you choose the ideal damper for your 5.7L or 6.4L HEMI-powered Challenger or Charger.
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