Spirited weekend track drives do not have to sacrifice daily driving comfort or performance.  Designed for the performance enthusiast in mind, the RS-R Sports-I coilover system provides a comfortable ride for everyday use, yet is sufficient enough for those effervescent track days. Fitment Information Infiniti Q50 Sport / RedSport AWD (2016, 2017, 2018, 2019, 2020) Specs & Features Preset Approximate Height From RS-R:Front -35mm to -40mm (-1.4in to -1.6in)Rear -35mm to -40mm (-1.4in to -1.6in) Maximum Adjustment Ranges:Front 0mm to -85mm (0in to -3.4in)Rear 0mm to -100mm (0in to -4.0in) Recommended Adjustments for Optimal Ride-ability:Front -10mm to -65mm (-0.4in to -2.6in)Rear -20mm to -65mm (-0.8in to -2.6in) Spring Rates:Front 10.0kg/mmRear 5.00kg/mm Product Description TECHNOLOGY OF RS-R’S HAND ASSEMBLED MONO-TUBE DAMPERS Quality and Detail The RS-R coilovers are all Monotube hand assembled systems specifically designed to improve ride quality, performance, and comfort.  Utilizing components such as; laser cut upper mounts, hand welded lower brackets, vehicle specific valving, are all assembled by hand to ensure quality and detail. Urethane Bushing Technology Utilizing Urethane bushing instead of bearing to reduce excessive vibrations from every day driving, as well as minimizing noises from suspension movements. The Silent Roller Bearings On MacPherson type suspension, as the suspension rotates along with the steering wheel, the coil springs may be prone to twisting.  RS-R suspension utilizes roller bearings to eliminate spring twist noise. Comfort and Adjustment Rubber padding is utilized to help eliminate potential noise from suspension movements. Damper adjustment dials are up to 36 way adjustable to tune the shocks compression and rebound to each individuals needs for almost any driving condition. Damping Adjustment Damper adjustment dials are up to 36 way adjustable to tune the shocks compression and rebound to each individuals needs for almost any driving condition. Refined Camber Tuning  If desired, the upper mounts on select vehicles can add 1.5 degree of camber from the preset setting by unbolting the upper mount and rotating the plate 180 degrees.  (for more precise control of camber, adjustable camber plates are available for select models)