Rev9 Hyper-Street II Coilovers for Infiniti Q70 Q70L AWD (Y51) 2014-2019 (W/DDS)

Rev9 Hyper-Street II Coilovers for Infiniti Q70 Q70L AWD (Y51) 2014-2019 (W/DDS)

Bring the stance you have in mind to your 2014-2019 Infiniti Q70 Q70L AWD (Y51) (W/DDS) without letting the suspension budget take over the whole build. Rev9 Hyper-Street II is our most affordable coilover line, with mono-tube dampers, 32 clicks of rebound adjustment, and separate ride-height and spring-preload controls. Dial the look toward your taste and tune the damper response from a more relaxed feel toward a firmer, sportier setup. It is our pick for excellent entry-level value, backed by Rev9’s one-year limited manufacturer warranty.

🏎️ Built Around Your Infiniti Q70 Q70L AWD

On this application, drivetrain and factory suspension equipment deserve as much attention as the model year. Electronic damping, self-leveling systems, and different lower-mount designs can change the parts or additional equipment needed. Confirm those details, choose a usable ride height, and finish the installation with alignment and clearance checks.

📐 Suspension Performance: Put the Adjustability to Work

The Hyper-Street II setup gives your Infiniti Q70 Q70L AWD a way to refine how the suspension settles after bumps, braking, and changes of direction. Its mono-tube dampers control spring motion, while 32 rebound positions let you compare the speed of suspension extension in repeatable steps. A more relaxed setting allows freer movement; adding rebound slows extension and can make the response feel more settled. The useful setting keeps the tire following the surface while controlling repeated body movement.

Rebound adjustment influences the timing of body movement and transient load transfer. Spring rates, anti-roll bars, tires, alignment, and suspension geometry still shape the overall balance. Excessive rebound can stop the suspension recovering between repeated bumps, leaving less usable travel and reducing grip. Use the adjustability to find a controlled, predictable response, with enough compliance for the surface you actually drive.

🔧 Set the Stance Separately From Spring Preload

The full-length adjustment system changes assembly length at the lower mount rather than relying only on compressing the spring to lower the vehicle. That separation makes the setup easier to approach in stages: establish the specified preload, set the intended ride height, and check available travel. Preload changes do not change the spring rate of a linear spring. The final ride depends on the selected height, spring rate, tires, and damping settings.

🔧 Features and Hardware

• Mono-tube damper construction with separate oil and pressurized-gas chambers.
• 32 clicks of rebound adjustment for repeatable setup changes.
• Full-length adjustment for changing ride height separately from the spring-seat setting.
• Independent spring-preload adjustment for following the kit’s setup requirements.
• Steel alloy construction with aluminum hardware.
• Supplied spring rates: 12 kg/mm (672 lbs/inch) front and 8 kg/mm (448lbs/inch) rear.
• Front top mount: Yes, Pillow Ball Type. Rear top mount: Yes, Pillow Ball Type.

🔧 Spring and Mount Details for R9-HS2-197_3

The R9-HS2-197_3 specification lists 12 kg/mm (672 lbs/inch) at the front and 8 kg/mm (448lbs/inch) at the rear. These are the spring rates supplied for this application, so they are more useful for comparing kits than a general “soft” or “stiff” label. Motion ratio, vehicle weight, tire construction, and damping also affect how the setup feels.

📋 Vehicle Fitment

• 2014 Infiniti Q70 Q70L AWD (Y51) (W/DDS)
• 2015 Infiniti Q70 Q70L AWD (Y51) (W/DDS)
• 2016 Infiniti Q70 Q70L AWD (Y51) (W/DDS)
• 2017 Infiniti Q70 Q70L AWD (Y51) (W/DDS)
• 2018 Infiniti Q70 Q70L AWD (Y51) (W/DDS)
• 2019 Infiniti Q70 Q70L AWD (Y51) (W/DDS)

Manufacturer application: Infiniti Q70 AWD w/ DDS (Y51) 2014-2019

📌 Application Notes

• Manufacturer application detail: 48 mm FLM.

📏 Technical Specifications

🧠 SuspensionHouse.com Tech Tuning Tips

Find the settings your Infiniti Q70 Q70L AWD likes by making one repeatable change at a time. Use the same tire pressures, normal vehicle load, and familiar route for ride checks. Keep left and right settings equal on each axle. Evaluate cornering balance on a controlled course rather than pushing the limits on public roads.

1. Set the stance first. Establish ride height and the required spring preload using the instructions for the exact kit. Keep height fixed during damping tests. The rebound dial changes suspension response; it does not set static ride height or change the rate of a linear spring.
2. Begin at Rev9’s soft baseline. Its published Hyper-Street II starting point is 32 clicks soft from full firm. Gently find the firm reference, then count outward toward soft. Never force an adjuster past a stop, and follow the included instructions if the exact kit differs.
3. Build a balanced baseline. Drive at a moderate pace and note float, repeated bouncing, harshness, and how quickly the car settles. Add two clicks of firmness at all four corners, then compare under the same conditions. With counts recorded out from full firm, 32 front / 32 rear becomes 30 front / 30 rear. Rev9 recommends small changes and a full day of evaluation between adjustments.
4. Compare front and rear separately. Once the overall ride feels controlled, change only the front pair by two clicks, evaluate, and return to the baseline before trying the same change at the rear. Record both axle settings so you can reproduce the best combination.
5. Understand a firmer front setting. More front rebound can give a more settled front-end response and may make the car less eager to rotate during a transition. Excessive front damping can reduce compliance and contribute to understeer, especially on uneven surfaces. Note whether the behavior occurs on entry, mid-corner, or exit.
6. Understand a firmer rear setting. More rear rebound relative to the front can make some cars more willing to rotate and reduce an understeer tendency during transitions. Too much can make the rear nervous or reduce rear grip. These effects depend on the chassis, tires, surface, and phase of the corner; a firmer rear is not automatically a faster setup.
7. Finish with a comparison test. Return to the previous setting to confirm that the latest change improved the car. Keep the least firmness that gives the response and control you want. If the tires skip, the ride becomes harsh, or repeated bumps make the suspension feel progressively lower, reduce rebound and reassess. Rubbing or bottoming needs a clearance or travel solution, not simply more damping.

Our tuning goal: a Infiniti Q70 Q70L AWD that looks right to you, settles cleanly after bumps, and responds predictably. The best front/rear split is the one you can verify on your own setup, not a universal click count.

🏁 About Rev9 Hyper-Street II

California-based Rev9 has been serving enthusiasts since 2010, and Hyper-Street II is our most affordable coilover line. It earns our pick for excellent entry-level value by including the core adjustments builders want: ride height, spring preload, and 32-click rebound control. Steel alloy construction, aluminum hardware, threaded damper bodies, and application-specific springs put useful tuning features within reach of a first suspension budget. It is a strong bang-for-the-buck starting point for bringing your Infiniti Q70 Q70L AWD stance and ride response closer to your own taste.

🛡️ One-Year Limited Manufacturer Warranty

Rev9 covers defects in materials and workmanship for one year from the original purchase date. Coverage applies to the original purchaser, is non-transferable, and requires proof of purchase. Manufacturer terms, exclusions, and installation/setup requirements apply. Read Rev9’s full coilover warranty terms.

❤️ Why Buy From SuspensionHouse

We started SuspensionHouse in 2014, and we’re enthusiasts just like you. We’re a small, family-owned business and an authorized Rev9 dealer, with a focus on fast shipping, helpful communication, and parts we’re excited to put on our own builds. Every order supports our family’s business. Thanks for checking us out and letting us be part of your build.

Part #: R9-HS2-197_3

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