Audi D-AU-18 S4 (AWD) 2004-2006 Coilover 2010-2016 Carefully matched spring and damper

Carefully matched spring and damper rates

Swift Spring Upgrade Available On Most Applications

Maintains factory comfort level

Truhart Air Plus Air struts feature a full twin tube design with integrated aluminum top mounts

Custom Spring Rates And Swift Springs Available

Audi D-AU-18 S4 (AWD) 2004-2006 Coilover 2010-2016 Carefully matched spring and damperThe RS Series suspension kit is our most popular coilover. Featuring a 36 way damping and rebound adjustable monotube design, RS Series coilovers are perfect for the modified street car that also sees occasional track days. This coilover has separate height and preload adjustments allowing for optimal suspension tuning while maintaining full strut travel at all times. Key Features: Uses either a rubber upper mount or pillowball rubber upper mounts.