ATI Damper 7.074in Aluminum 6 Groove 15% Underdrive 2 Ring (20092020 Dodge 5.7L / 6.4L HEMI Truck) ATI918454
7.074in Aluminum 15% Underdrive Super Damper for 20092020 Dodge 5.7L & 6.4L HEMI Trucks
The ATI 7.074-inch Aluminum Super Damper (part ATI918454) is engineered for 20092020 Dodge Ram trucks equipped with 5.7L and 6.4L HEMI engines. With a 15% underdrive ratio, this 2-ring aluminum damper reduces accessory drag, improves efficiency, and delivers unmatched harmonic control. Designed to handle high-load and high-RPM conditions, its the ideal choice for street, towing, or performance applications where power and balance matter most.
Performance Highlights
- 15% underdrive ratio reduces accessory speed for improved efficiency and power
- 7.074-inch outer diameter provides optimal balance and damping precision
- Lightweight aluminum construction reduces rotating mass and improves throttle response
- 6-groove pulley maintains compatibility with OEM belt systems
- 2-ring inertia assembly offers refined vibration control at all RPM levels
- SFI 18.1 certified for sanctioned racing and safety compliance
- Fully rebuildable for long-term accuracy and durability
Quick Specs
- Outer Diameter: 7.074 inches
- Material: Aluminum
- Pulley Type: 6 Groove
- Drive Ratio: 15% Underdrive
- Design: 2-Ring Super Damper
- Certification: SFI 18.1
- Applications: 20092020 Dodge 5.7L / 6.4L HEMI Truck Engines
- Part Number: ATI918454
Why Choose ATIs 15% UD Super Damper for HEMI Trucks?
The ATI918454 Super Damper offers superior vibration control and improved performance for both 5.7L and 6.4L HEMI trucks. The 15% underdrive ratio reduces parasitic losses from front-end accessories, freeing up horsepower while maintaining full functionality for charging, cooling, and power steering systems. The 2-ring aluminum design ensures smooth operation, making it a perfect choice for heavy-duty towing or high-performance street builds.
Frequently Asked Questions
What does 15% underdrive mean?
The 15% underdrive pulley slows accessory rotation by approximately 15%, reducing drag on the crankshaft and freeing up horsepower for improved performance.
Is this damper compatible with both 5.7L and 6.4L HEMI engines?
Yes. The ATI918454 fits all 20092020 Dodge Ram trucks equipped with 5.7L or 6.4L HEMI engines.
Does this affect accessory functionality?
No. The slight underdrive maintains full accessory performance, including charging, cooling, and A/C operation, while reducing drag for increased efficiency.
Is it rebuildable?
Yes. Like all ATI Super Dampers, the ATI918454 is fully rebuildable with ATI service parts for long-lasting precision and reliability.
Vehicle Fitment
- 2009 Dodge Ram 1500 5.7L HEMI
- 2010 Dodge Ram 1500 5.7L HEMI
- 20112020 Ram 1500 5.7L HEMI
- 20112020 Ram 2500 / 3500 6.4L HEMI
- 20092020 Dodge / Ram 5.7L & 6.4L HEMI Truck Platforms
Contact Beefcake Racing
Beefcake Racing is your trusted dealer for ATI Super Dampers and performance parts for Dodge and Ram trucks. For expert assistance or to place an order, contact sales@beefcakeracing.com or call 1-855-827-7223. Our knowledgeable staff can help you choose the perfect damper for your HEMI-powered truck build.
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