The RS-R Down Sus Lowering Springs provides a mild drop and improved handling for drivers who are looking to lessen the fender to wheel gap. Taking into consideration the factory suspension geometry, shock dampening, spring rate and ride height levels, RS-R ensures that the springs you are getting were made for your car both for performance and for comfort. Fitment Information Infiniti M37X AWD (2011, 2012, 2013) Infiniti Q70 V6 AWD (2014, 2015, 2016, 2017, 2018, 2019) Specs & Features Lowers 40 to 45mm Front and 30 to 35mm Rear Spring Rates: Front 7.34kg/mm Rear 2.70kg/mm True Japanese heritage from the JDM market Performance spring with comfort in mind Includes all 4 springs Designed to work with stock shocks Product Description True Japanese lowering springs. RS-R is one of the top aftermarket spring manufactures in Japan and is proud to bring their technology to the US.  These authentic JDM lowering springs provide you with both comfort and performance while giving you the lowered stance and much improved handling characteristics that you look for in a lowering spring.  RS-R takes careful consideration of the vehicle these springs were designed for to ensure the factory suspension geometry, shock dampening, spring rate and right height levels are designed for your specific vehicle to give you the best performance and control possible.