Upgrade your BC Racing Coilovers to Swift Springs, or change your spring rates. Swift Springs innovative designs have made us a staple in the performance tuning world. Our products are the result of over 90 years of experience in industrial spring manufacturing. Our engineers have spent countless hours developing and re-developing our springs, in order to create a product that is light, durable, and compliant, while still maintaining linear spring rates. Many enthusiasts will swap springs from brand to brand with the only noticeable difference being a stiffer or softer ride. But what if a spring could offer a noticeable increase in traction, smoother weight transfer, better ride quality, lower tire temperatures, and a more predictable feel? The engineers at Swift have taken that 'what if' and turned it into reality. All Swift Springs are manufactured using (H5S.TW.) which is far superior to silicone chrome steel and allows us to wind our springs with less coils, resulting in reduced un-sprung weight and increased stroke. Not sure what size you need? Click here to shop for Swift Springs by car instead. Additional Notes Customize at your own discretion. Please ensure you are selecting the right specs when customizing your coilovers. We highly recommend ensuring your struts are properly valved to match your chosen spring rates. If you're increasing or decreasing spring rates by 4k or more, it's best to revalve your struts accordingly. Failing to properly match your springs and struts can lead to coilover damage, reduced performance, a noticeably harsher ride, and may void the warranty. Specifications Brand: Swift Springs Quantity 2 Springs Inner Diameter: 62mm Length: 140mm