Product Details
The Swift Spec-R Lowering Springs for the 2007-2013 BMW 335i (E90/E92) transform the E90 sedan and E92 coupe into sharper, more composed driving machines with a lowered stance that matches the 335i's performance potential. These E90/E92 335i lowering springs provide an approximate 1.0" front and 0.8" rear drop with spring rates of 4 Kg/mm front and 11 Kg/mm rear, designed to work at the upper limits of the stock shock valving. Built in Japan from Swift's proprietary H5S.TW material, these 335i springs are popular with HPDE and autocross enthusiasts who want reduced body roll and improved weight transfer without a harsh daily ride.
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 | 4X905R |
| Part Name | Swift Spec-R Lowering Springs |
| Vehicle | 2007-2013 BMW 335i |
| Chassis Code | E90/E92 |
| Spring Rate - Front | 4 Kg/mm |
| Spring Rate - Rear | 11 Kg/mm |
| Approximate Drop - Front | 1.0" |
| Approximate Drop - Rear | 0.8" |
Vehicle Fitment
- 2007 BMW 335i (E90/E92)
- 2008 BMW 335i (E90/E92)
- 2009 BMW 335i (E90/E92)
- 2010 BMW 335i (E90/E92)
- 2011 BMW 335i (E90/E92)
- 2012 BMW 335i (E90/E92)
- 2013 BMW 335i (E90/E92)




