The Swift Spec-R Lowering Springs for the 2015+ Lexus RC F (USC10) bring the RC F”s ride height down to match its naturally aspirated V8 performance, improving both aesthetics and high-speed handling. These USC10 RC F lowering springs deliver an approximate 1.3″” front and 1.0″” rear drop with spring rates of 9 Kg/mm front and 16 Kg/mm rear, designed for the RC F”s Adaptive Variable Suspension. Built in Japan from Swift”s proprietary high-tensile spring steel, these RC F springs provide a lower center of gravity and reduced body roll for more confident braking zones and corner entry at track days.
Swift Spec-R Technology
Proprietary high-tensile spring steel, manufactured in Japan
Optimized ride height to maximize suspension geometry at lowered position
Increased spring rates tuned to usable shock stroke for balanced performance
Fewer coils reduce unsprung mass and completely eliminate coil bind
Quicker transient response for improved traction and road feedback
Vehicle-specific bump rubber engineering to prevent bottoming out
Features
Track-proven in HPDE and SCCA competition
Lowered center of gravity for improved cornering grip
Reduced body roll and sharper handling response
Comfortable enough for daily driving
Compatible with OEM and aftermarket shocks/struts
Direct bolt-on installation with no modifications required
Specifications
| Part Number |
4T914R |
| Part Name |
Swift Spec-R Lowering Springs |
| Vehicle |
2015+ Lexus RC F |
| Chassis Code |
USC10 |
| Spring Rate – Front |
9 Kg/mm |
| Spring Rate – Rear |
16 Kg/mm |
| Approximate Drop – Front |
1.3″” |
| Approximate Drop – Rear |
1.0″” |
| Notes |
– |
Vehicle Fitment
2015 Lexus RC F (USC10)
2016 Lexus RC F (USC10)
2017 Lexus RC F (USC10)
2018 Lexus RC F (USC10)
2019 Lexus RC F (USC10)
2020 Lexus RC F (USC10)
2021 Lexus RC F (USC10)
2022 Lexus RC F (USC10)
2023 Lexus RC F (USC10)
2024 Lexus RC F (USC10)
2025 Lexus RC F (USC10)
2026 Lexus RC F (USC10)
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