Product Details
These RS-R Best-i Active coilovers fit the 2015-2025 Lexus RC350 F Sport RWD (GSC10).
RS-R Best-i Active coilovers for the GSC10 RC350 F Sport replace the factory adaptive dampers and keep 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 is needed and the factory driving modes stay.
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.
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 | XLIT104MA |
| Part Name | RS-R Best-i Active Coilovers |
| Vehicle | 2015-2025 Lexus RC350 F Sport |
| Chassis Code | GSC10 |
| Drivetrain | RWD |
| Damping Adjustment | 36-Level Single-Knob |
| Ride-Height Adjustable | Yes |
| Damper Construction | Monotube |
| Preset Approximate Height - Front | -30mm to -35mm (-1.2in to -1.4in) |
| Preset Approximate Height - Rear | -20mm to -25mm (-0.8in to -1.0in) |
| Maximum Adjustment Range - Front | +15mm to -105mm (+0.6in to -4.2in) |
| Maximum Adjustment Range - Rear | 0mm to -55mm (0in to -2.2in) |
| Recommended Adjustment Range - Front | -5mm to -55mm (-0.2in to -2.2in) |
| Recommended Adjustment Range - Rear | 0mm to -55mm (0in to -2.2in) |
| Spring Rate - Front | 9.00 Kg/mm |
| Spring Rate - Rear | 9.00 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 |
| Notes | - |