Product Details
The Swift Sport Lowering Springs for the 2008-2010 Subaru WRX STI (GRB) give the GRB hatchback STI a lower stance and sportier handling while maintaining the comfortable ride quality for daily driving. These GRB STI lowering springs deliver an approximate 0.8" front and 0.8" rear drop, tuned for the STI's Bilstein inverted front struts and multi-link rear. Made in Japan from Swift's proprietary H5S.TW spring steel, these WRX STI springs reduce body roll and improve cornering grip without the harshness that comes with most aftermarket lowering solutions.
Swift Sport Spring Technology
- Proprietary H5S.TW high-tensile spring steel, manufactured in Japan
- Designed to lower within each vehicle's usable shock stroke range
- Fewer coils reduce unsprung mass and eliminate coil bind
- Quicker transient response for a smoother ride over rough surfaces
- Vehicle-specific tuning preserves each car's intended ride character
- Bump rubber integration prevents suspension bottoming out
Features
- Sportier stance with reduced wheel gap
- Improved handling with reduced body roll
- Comfortable ride quality preserved for daily driving
- Lower center of gravity for better cornering confidence
- Compatible with OEM and aftermarket shocks/struts
- Direct bolt-on installation with no modifications required
Specifications
| Part Number | 4F907 |
| Part Name | Swift Sport Lowering Springs |
| Vehicle | 2008-2010 Subaru WRX STI |
| Chassis Code | GRB |
| Spring Rate - Front | 4.5 Kg/mm |
| Spring Rate - Rear | 4.2 Kg/mm |
| Approximate Drop - Front | 0.8" |
| Approximate Drop - Rear | 0.8" |



