Swift SPEC-R Sport Springs - BMW

Built for track duty, Swift Spec-R springs are designed at the upper limits of the OEM shock valving. Track tested and tuned for optimum performance yet comfortable enough for a daily driver.

Swift made Sport Springs keeps the quality ride you get from the showroom, and adds improved handling and lower ride height for driving enthusiasts and style minded drivers who demand only the best.

From HPDE events to SCCA competition, Swift Spec-R Sport Springs are made for the track enthusiast looking to take their vehicle to the next level.

Swift Spec-R Sport Springs were engineered with 3 characteristics in mind.

  1. Modified ride height compared to Sport Springs to maximize optimal suspension geometry.
  2. Further increasing the spring rate to enhance overall performance. The increase in spring rate is based on the upper limits of the vehicles factory shock valving.
  3. Maintaining optimal comfort level for street use.


BMW Chassis Code Year PART NO. Spring Rate Drop
Front Rear Front Rear
Lbs/ Inch Kg/mm Lbs/Inch Inch Inch
335i E90, 92 07-11 4X905R 223 11.0 615 -1.0 -0.8
M3 E90, 92 08+ 4X903R 279 12.0 670 1.0 -0.7
135i E82 08+ 4X904R 201 9.0 503 -1.0 -1.0