RS-R T171S -SuperDown Lowering Springs Fits 2013-15 Lexus GS350 F-Sport RWD *We keep these in stock for immediate shipment. Place your order before 10 am EST on a weekday and we'll ship the same business day* The Superdown provides a lowered stance and improved handling to fulfill your needs to lower your car and improve its handling. 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. Approximate Drop (2013-2015): Front -45mm to -50mm (-1.8in to -2.0in) Rear -45mm to -50mm (-1.8in to -2.0in) Approximate Drop (2013-2015 F-Sport): Front -40mm to -45mm (1.6in to -1.8in) Rear -40mm to -45mm (1.6in to -1.8in) Spring Rates: Front 4.89kg/mm Rear 8.16kg/mm.