Product Details
The Swift Spec-R Lowering Springs for the 2011-2014 Subaru Impreza WRX STI (GRB) give the hatchback STI a lower, more aggressive stance while optimizing suspension geometry for competitive driving. These GRB STI lowering springs provide an approximate 0.6" front and 0.6" rear drop with spring rates of 6 Kg/mm front and 7.2 Kg/mm rear, tuned for the STI's inverted front struts and multi-link rear. Made in Japan from Swift's proprietary H5S.TW material, these WRX STI springs deliver reduced body roll, quicker weight transfer, and improved traction for autocross, rally-cross, and spirited mountain road driving.
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 | 4F907R |
| Part Name | Swift Spec-R Lowering Springs |
| Vehicle | 2011-2014 Subaru Impreza WRX STI |
| Chassis Code | GRB |
| Spring Rate - Front | 6 Kg/mm |
| Spring Rate - Rear | 7.2 Kg/mm |
| Approximate Drop - Front | 0.6" |
| Approximate Drop - Rear | 0.6" |
Vehicle Fitment
- 2011 Subaru Impreza WRX STI (GRB)
- 2012 Subaru Impreza WRX STI (GRB)
- 2013 Subaru Impreza WRX STI (GRB)
- 2014 Subaru Impreza WRX STI (GRB)




