Product Details

RS-R Down Sus lowering springs for the 2016+ Infiniti Q50 3.0t Sport (V37) drop the car into a cleaner, more purposeful stance while tightening body roll and sharpening turn-in on everyday roads. Each set is engineered specifically for this Q50 chassis, so drop, spring rate and factory damper tune stay in balance — the car sits where you want it and still drives like a daily.

Racing Studio-R built its first suspension in Osaka in 1972 and has been refining the Down Sus spring for more than fifty years. Each set is progressive-rate, cold-wound and heat-treated in-house in Japan, then matched to the factory shock valving and ride-height target of the specific chassis it bolts onto. Backed by RS-R’s 3-year / 50,000 km fatigue warranty.

Features

  • Progressive-rate coil tuned to the factory damper
  • Vehicle-specific drop and rate — no universal cuts
  • Cold-wound from high-grade SAE alloy steel
  • Powder-coated for long-term corrosion resistance
  • 3-year / 50,000 km RS-R spring-fatigue warranty
  • Made in Osaka, Japan
Specifications
Part Number N145D
Part Name RS-R Down Sus Lowering Springs
Vehicle 2016+ Infiniti Q50 3.0t Sport
Chassis Code V37
Drivetrain AWD
Ride-Height Adjustable No
Spring Type Progressive
Approximate Drop - Front -30mm to -35mm (-1.2in to -1.4in)
Approximate Drop - Rear -25mm to -30mm (-1.0in to -1.2in)
Spring Rate - Front 9.90 Kg/mm
Spring Rate - Rear 3.70 Kg/mm
Warranty 3 Years / 50,000 km
Vehicle Fitment
  • 2016 Infiniti Q50 3.0t Sport AWD (V37)
  • 2017 Infiniti Q50 3.0t Sport AWD (V37)
  • 2018 Infiniti Q50 3.0t Sport AWD (V37)
  • 2019 Infiniti Q50 3.0t Sport AWD (V37)
  • 2020 Infiniti Q50 3.0t Sport AWD (V37)
  • 2021 Infiniti Q50 3.0t Sport AWD (V37)
  • 2022 Infiniti Q50 3.0t Sport AWD (V37)
  • 2023 Infiniti Q50 3.0t Sport AWD (V37)

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