Product Details
The Swift Spec-R Lowering Springs for the 2022+ Honda Civic Si (FE1) give your 11th-gen Si the lower stance and sharper handling the platform deserves. These FE1 Civic Si lowering springs drop the ride height approximately 1.0" in the front and 1.0" in the rear with a 4.1 Kg/mm front spring rate, engineered to work harmoniously with the Si's adaptive dampers and independent rear suspension. Built in Japan from Swift's proprietary H5S.TW high-tensile spring steel, these Civic Si springs eliminate excessive wheel gap while reducing body roll and improving cornering grip for spirited canyon drives and HPDE track days.
Swift Spec-R Technology
- Proprietary H5S.TW 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 | 4H923R |
| Part Name | Swift Spec-R Lowering Springs |
| Vehicle | 2022+ Honda Civic Si |
| Chassis Code | FE1 |
| Spring Rate - Front | 4.1 Kg/mm |
| Approximate Drop - Front | 1.0" |
| Approximate Drop - Rear | 1.0" |
| Quantity | 4 Springs |
Vehicle Fitment
- 2022 Honda Civic Si (FE1)
- 2023 Honda Civic Si (FE1)
- 2024 Honda Civic Si (FE1)
- 2025 Honda Civic Si (FE1)
- 2026 Honda Civic Si (FE1)









