Swift Springs Standard Conventional Spring (Progressive) - OD: 5" / Length: 6.7" Spring Rate (lbs/inch):600 2) are designed and developed

2) are designed and developed for all motoring enthusiasts wanting excellent handling without sacrificing comfort

Every kit is extensively tested on the Y20 chassis and refined until it balances ride quality with performance — the reason XC60 coilovers from BC Racing are the best-selling adjustable kits in their segment worldwide

2009 BMW 328Xi Sedan (E90)

2017 BMW X6 AWD (F86)

H&R RSS Coilovers for your 2007-2014 Mini Cooper S (R56) are designed and tested on the famous Nurburgring

Swift Springs Standard Conventional Spring (Progressive) - OD: 5" / Length: 6.7" Spring Rate (lbs/inch):600 2) are designed and developedSwift Springs Standard Conventional Springs (Progressive) in 5" OD and 6. 7" length feature a dual rate design purpose built for circle track racing applications that require a softer initial rate transitioning to a stiffer rate under heavy load. This 5" OD Swift progressive race spring is manufactured in Japan from proprietary H5S. TW high tensile alloy steel, delivering the variable rate behavior that helps circle track racers maintain traction