Steeda's performance lowering springs improve the overall handling of the Cobra by lowering the center of gravity and reducing body roll and pitching motion. The reduced longitudinal pitch of the vehicle during heavy braking, due to the optimized spring calibration, improves the overall braking efficiency. The higher rate of the front springs reduces the amount of brake dive and resultant load transfer to the front tires. This causes the load on all four tires to be more evenly distributed providing additional traction to the rear tires. The additional gain in rear traction usually results in reduced braking distances. The proportionate increase in spring rate also reduces body roll, which limits adverse suspension movement. This confines the suspension geometry to stay within parameters that enhance the tires contact patch relative to the road, The result is improved vehicle cornering and handling, because front and rear tire loading is more evenly distributed. Therefore, higher cornering limits can be achieved because the built in understeer characteristics are reduced and provide for a more neutral yet safe vehicle. 03-04 Cobra Spring Specifications Lowers the car approximately 1" Front: Progressive helical compression Rear: Progressive helical compression Spring rate front working range 720-780 lb/in Spring rate rear working range 650-790 lb/in 99-01 Cobra Spring Specifications Lowers the car approximately 1.25” Front: Progressive helical compression Rear: Progressive helical compression Spring rate front working range 540-600 lb/in Spring rate rear working range 500-600 lb/in IRSsprings$346.95 Year: 99-0103-04(+40.00) www.realspeedauto.com Ph.631-563-7325 All parts listed are for the Ford Mustang unless otherwise noted. Copyright 2018 Realspeed Automotive Inc. All rights reserved.