RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA
RS-R Best-i Active Coilovers - 2016+ Infiniti Q50 Red Sport 400 RWD XLIN144MA

RS-R

|

SKU: XLIN144MA

RS-R Best-i Active Coilovers for 2016+ Infiniti Q50 Red Sport 400 RWD

$2,999.00
In Stock

Fitment Notes

All fitment information on our website is provided by the manufacturer. It is the customer's responsibility to thoroughly read the product description and confirm fitment before placing an order and proceeding with installation.

Unless specified otherwise, all suspension products are designed for 2WD vehicles only. Any notes or descriptions related to electronic damping systems (EDC, DDS, etc.) apply strictly to vehicle fitment. Aftermarket coilovers are not compatible with OEM electronic damping control systems unless explicitly stated.

*Product images may not represent the actual SKU.

Handling Time

All handling times are estimates and may change at any time.

  • In-Stock: 1 business day
  • Out of Stock: 3-4 weeks
30-Day Returns

Orders can be returned within 30 days of fulfillment if all rules shown below are met.

  • Products must be in original packaging and in a new and resalable condition.
  • Any product that was used or fully/partially installed is non-returnable.
  • Custom products, special order products, and services are non-returnable and non-refundable.
  • Shipping fees and tax are non-refundable.
  • If the return of an item was caused by an error on our part, or a manufacturer's part, we will cover the shipping fees.

More Details

3-Year Manufacturer Warranty

All RS-R USA products come with a limited warranty covering manufacturing defects. All lowering springs are covered for 3 years or 36,000 miles (whichever comes first) from the date of purchase. All coilovers and coilover accessories are covered for 1 year or 12,000 miles (whichever comes first) from the date of purchase. Warranty coverage applies to the original purchaser and is non transferable.

RS-R USA will repair, replace, or refund the purchase price of the defective product at RS-R USA's discretion upon completion of inspection and verification of a product defect.

More Information

Free Shipping

Orders $250+ free-shipping in USA.*

Best Price Guarantee

We match or beat any price.

0% APR Financing

Install now, pay later.

Authorized Retailer

Official partner of top brands.

Product Details

RS-R Best-i Active coilovers for the 2016+ Infiniti Q50 Red Sport 400 RWD are built for a very specific problem: replacing a factory-adaptive damper without losing the factory controller. Best-i Active keeps the OEM AVS/DDS signal, Ti2000 springs, pillowball uppers, and the full 36-level damper range, all controlled through the car’s original driving-mode button. No warning-light canceler required, no loss of factory modes — you get a proper dropped stance and adjustable damping while the dashboard still behaves like stock.

Best-i Active is RS-R’s flagship coilover for factory-active suspension cars — the only aftermarket coilover family that retains the OEM AVS/DDS adaptive damper controller while still delivering a full ride-height drop and 36-level damping. It uses Ti2000 springs, pillowball upper mounts, and a monotube damper body that bolts into the factory harness without a warning-light canceler. If you drive a GS F-Sport, GT-R, IS F-Sport, or similar AVS-equipped chassis, this is the only coilover that keeps the factory driving-mode logic intact.

Features

  • Factory AVS / DDS compatible — no warning-light canceler needed
  • Ti2000 springs for reduced unsprung weight
  • Pillowball-bushing upper mounts (spherical bearing, no camber adjustment)
  • 36-level single-knob damping through factory controller
  • Monotube, hand-assembled in Japan
  • Rebuildable / serviceable dampers
  • 1-Year / 12,000-mile RS-R warranty
What’s Included
  • Full coilover set (front and rear)
  • Hex and allen wrenches
  • Upper rubber seat for rear
  • Hex nut, bolt and washer for rear shock
  • Waterproof rubber damper cover
  • Spring tubes for front and rear
Specifications
Part Number XLIN144MA
Part Name RS-R Best-i Active Coilovers
Vehicle 2016+ Infiniti Q50 Red Sport 400
Drivetrain RWD
Damping Adjustment 36-Level Single-Knob
Ride-Height Adjustable Yes
Damper Construction Monotube
Preset Approximate Height - Front -30mm (1.2in)
Preset Approximate Height - Rear -30mm (1.2in)
Maximum Adjustment Range - Front +10mm to -85mm (+0.4in to -3.4in)
Maximum Adjustment Range - Rear -5mm to -95mm (-0.2in to -3.8in)
Recommended Adjustment Range - Front -15mm to -50mm (-0.6in to -2.0in)
Recommended Adjustment Range - Rear -10mm to -55mm (-0.4in to -2.2in)
Spring Rate - Front 10.0 Kg/mm
Spring Rate - Rear 5.00 Kg/mm
Upper Mount - Front Pillowball Bushings (Spherical Bearing, no camber adjustment)
Upper Mount - Rear Pillowball Bushings
Suspension Design - Front True Coilover
Suspension Design - Rear Divorced
Rebuildable Yes
Warranty 1 Year / 12,000 Miles
Vehicle Fitment
  • 2016 Infiniti Q50 Red Sport 400 RWD
  • 2017 Infiniti Q50 Red Sport 400 RWD
  • 2018 Infiniti Q50 Red Sport 400 RWD
  • 2019 Infiniti Q50 Red Sport 400 RWD
  • 2020 Infiniti Q50 Red Sport 400 RWD
  • 2021 Infiniti Q50 Red Sport 400 RWD
  • 2022 Infiniti Q50 Red Sport 400 RWD
  • 2023 Infiniti Q50 Red Sport 400 RWD
  • 2024 Infiniti Q50 Red Sport 400 RWD
  • 2025 Infiniti Q50 Red Sport 400 RWD
  • 2026 Infiniti Q50 Red Sport 400 RWD
Go