Springs - NSX (91-05) - Swift 5” for Air Cup InstallsSwift Springs Sold in pairs, for the NSX, these springs are utilized in combination with Coilovers and the StanceParts Air Cup Kits to get a lower front stance. For BC Coilovers with Air Cups: Length 5 Inner Diameter 65mm Spring Rate 10kg note: if purchasing Air Cups for front AND rear on NSX, we recommend that you purchase 2 pairs of these springs) For KW Coilovers with Air Cups: Length 5" Inner Diameter 60mm Spring Rate 8kg note: the color of the