Product details
OVERVIEW
Swift Springs' Spec-R line is built around the company's signature small-ID, high-travel spring design, giving a linear rate through more of the spring's travel than a typical high-ID lowering spring. For the BMW 335i (E90/E92/E93), the Spec-R kit drops ride height while keeping the factory damper valving in a usable range for street and light track use.
SPECS
- Front spring rate: 4.0 kgf/mm
- Rear spring rate: 11.0 kgf/mm
- Front drop: approx. 1.0 in
- Rear drop: approx. 0.8 in
- Swift small-ID, high-travel spring construction
PARTS INCLUDED
- Front and rear Spec-R lowering springs (set of 4), as supplied by Swift Springs
TECH RESOURCES
Additional Parts Required
- None. Swift Springs specifies no additional hardware beyond the factory strut/shock assembly for installation.
Installation
- Swift Springs does not publish an installation PDF or a vehicle-specific install video for this kit; installation follows standard spring-compressor procedure onto the factory struts/shocks.
PART NUMBER
- 4X905R
VEHICLE APPLICATIONS
| Make | Model | Chassis | Engine | Years |
|---|---|---|---|---|
| BMW | 335i | E90 | N54 3.0L Twin-Turbo I6 | 2007–2010 |
| BMW | 335i | E90 | N55 3.0L Turbo I6 | 2011 |
| BMW | 335i | E92 | N54 3.0L Twin-Turbo I6 | 2007–2010 |
| BMW | 335i | E92 | N55 3.0L Turbo I6 | 2011–2013 |
| BMW | 335i | E93 | N54 3.0L Twin-Turbo I6 | 2007–2010 |
| BMW | 335i | E93 | N55 3.0L Turbo I6 | 2011–2013 |