Swift 4N911 Sport Lowering Springs for 2008+ Infiniti G37 X Coupe Swift Springs have been coined to be one of the best springs in the world. Widely used in many famous racing series such as GT and F1 series. Swift springs not only can change the spring rate, but can offer other advantages such as noticeably lighter unsprung mass, smoother weight transfer, better ride quality, lower tire temperature, and increased ability to predict vehicle reaction. Part Number: 4N911 -1.3" Front Drop / -1.0" Rear Drop 419/lbs inch Front Rating / 436/lbs Rear Rating