Product Details
RS-R Sports-i coilovers for the 2015+ Lexus RC300 RWD (GSC10L) balance daily-driver comfort with serious track capability on the same set of dampers. The 36-level single-knob adjustment, vehicle-specific spring rates, and full ride-height range let you dial the RC300 in for the commute on Monday and for a canyon run or track day on Saturday without touching a tool beyond the damper click wheel.
The Sports-i is RS-R’s foundation street-and-canyon coilover — a 36-level single-knob monotube damper built in-house in Osaka, Japan, with full ride-height adjustment and vehicle-specific spring rates. It is engineered to be driven daily yet firm enough for spirited weekend use. Backed by RS-R’s 1-year / 12,000-mile warranty and available as a rebuildable, serviceable unit.
Features
- 36-level single-knob damping adjustment
- Full ride-height adjustment via lower-mount perch
- Vehicle-specific spring rates matched to chassis
- Monotube internal piston, hand-assembled in Japan
- Rebuildable — damper cartridges can be overhauled
- 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 | XSPIT104M |
| Part Name | RS-R Sports-i Coilovers |
| Vehicle | 2015+ Lexus RC300 |
| Chassis Code | GSC10L |
| 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 | N/A |
| Maximum Adjustment Range - Front | +5mm to -90mm (+0.2in to -3.6in) |
| 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 -50mm (+0in to -2.0in) |
| Spring Rate - Front | 9.00 Kg/mm |
| Spring Rate - Rear | 9.00 Kg/mm |
| Upper Mount - Front | Rubber Bushings (OEM-style) |
| Upper Mount - Rear | Rubber Bushings (OEM-style) |
| Suspension Design - Front | True Coilover |
| Suspension Design - Rear | Divorced |
| Rebuildable | Yes |
| Warranty | 1 Year / 12,000 Miles |
Vehicle Fitment
- 2015 Lexus RC300 RWD (GSC10L)
- 2016 Lexus RC300 RWD (GSC10L)
- 2017 Lexus RC300 RWD (GSC10L)
- 2018 Lexus RC300 RWD (GSC10L)
- 2019 Lexus RC300 RWD (GSC10L)
- 2020 Lexus RC300 RWD (GSC10L)
- 2021 Lexus RC300 RWD (GSC10L)
- 2022 Lexus RC300 RWD (GSC10L)
- 2023 Lexus RC300 RWD (GSC10L)
- 2024 Lexus RC300 RWD (GSC10L)
- 2025 Lexus RC300 RWD (GSC10L)
- 2026 Lexus RC300 RWD (GSC10L)