Swift Springs Spec-R Lowering Springs – BMW M3 (E90/E92/E93)

OVERVIEW

Swift Springs' Spec-R line uses the company's signature small-ID, high-travel spring design for a more linear rate through the shock's travel than a typical high-ID lowering spring. For the E9x M3, the Spec-R kit lowers ride height for street and track use while working with the factory S65 V8's damper valving.

SPECS

• Front spring rate: 5.0 kgf/mm
• Rear spring rate: 12.0 kgf/mm
• Front drop: approx. 1.0 in
• Rear drop: approx. 0.7 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

Required Parts

• None. Swift Springs specifies no additional hardware beyond the factory strut/shock assembly for installation.

Notes

• 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

• 4X903R

VEHICLE APPLICATIONS