ATI Damper 5.67in Aluminum 7 Groove 4% Underdrive 1Pc (20072009 Nissan 350Z / 20092020 Nissan 370Z VQ35HR & VQ37VHR Engines) ATI918584
Performance Damper for Nissan 350Z & 370Z VQ Engines
The ATI 5.67-inch Aluminum Super Damper (part ATI918584) is built for Nissans VQ35HR and VQ37VHR engines powering the 20072009 350Z and 20092020 370Z. Featuring a 7-groove pulley and a 4% underdrive ratio, this lightweight, 1-piece damper reduces accessory drag, freeing up horsepower while maintaining stock reliability. Precision-balanced and SFI 18.1 certified, its ideal for enthusiasts who want sharper throttle response and smoother performance on the street or track.
Performance Highlights
- 5.67-inch outer diameter fits tightly in VQ engine bays with excellent balance
- 4% underdrive ratio lowers accessory load for improved engine efficiency
- 7-groove pulley maintains factory belt alignment and accessory function
- Lightweight aluminum construction enhances throttle response and reduces rotating mass
- Compatible with both 350Z and 370Z models using VQ35HR or VQ37VHR engines
- SFI 18.1 certified for sanctioned racing events
- Fully rebuildable for long-term use and consistent performance
Quick Specs
- Outer Diameter: 5.67 inches
- Material: Aluminum
- Pulley Type: 7 Groove
- Drive Ratio: 4% Underdrive
- Design: 1-Piece Super Damper
- Certification: SFI 18.1
- Applications: Nissan VQ35HR / VQ37VHR Engines (350Z & 370Z)
- Part Number: ATI918584
Why Choose ATIs 4% UD Super Damper for the VQ?
The ATI918584 Super Damper delivers reliable power gains and protection for the VQ platform. The 4% underdrive ratio frees up horsepower while keeping all factory systems operational. Its precise aluminum construction eliminates torsional vibration, protecting bearings and crankshafts during high-RPM use. Whether your Z is a street cruiser, drift car, or track machine, this damper offers the strength and stability you need.
Frequently Asked Questions
Whats the benefit of 4% underdrive?
The 4% underdrive ratio reduces accessory speed slightly, minimizing parasitic loss without affecting charging or cooling performance.
Is it compatible with stock belts?
Yes. The 7-groove pulley retains factory belt size and alignment for an easy, direct fit.
Can it handle high-RPM or boosted engines?
Absolutely. Its SFI 18.1 certified and built for extreme use in both forced-induction and naturally aspirated builds.
Is the damper rebuildable?
Yes. Like all ATI Super Dampers, the ATI918584 is fully rebuildable for years of reliable service.
Vehicle Fitment
- 2007 Nissan 350Z 3.5L VQ35HR
- 2008 Nissan 350Z 3.5L VQ35HR
- 2009 Nissan 350Z 3.5L VQ35HR
- 2009 Nissan 370Z 3.7L VQ37VHR
- 2010 Nissan 370Z 3.7L VQ37VHR
- 2011 Nissan 370Z 3.7L VQ37VHR
- 2012 Nissan 370Z 3.7L VQ37VHR
- 2013 Nissan 370Z 3.7L VQ37VHR
- 2014 Nissan 370Z 3.7L VQ37VHR
- 2015 Nissan 370Z 3.7L VQ37VHR
- 2016 Nissan 370Z 3.7L VQ37VHR
- 2017 Nissan 370Z 3.7L VQ37VHR
- 2018 Nissan 370Z 3.7L VQ37VHR
- 2019 Nissan 370Z 3.7L VQ37VHR
- 2020 Nissan 370Z 3.7L VQ37VHR
Contact Beefcake Racing
Beefcake Racing is your source for ATI Super Dampers and Nissan performance parts. For fitment help or to place an order, email sales@beefcakeracing.com or call 1-855-827-7223. Our experts can help you find the best damper for your VQ-powered Z.
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