Ford Mustang Suspension Suspension Kit - ST - ST XTA - Adjustable Rebound & Top Strut Mount Height Adjustable Coilovers If the rebound force is decreased, the car will feel more comfortable when on the move. Lowering AmountFront: 30-60mm / 1.2-2.4inRear: 35-55mm / 1.4-2.2inSpring RatesFront: ProgressiveRear: ProgressiveST XTA COILOVERS - YOUR CAR. YOUR... For increased performance, the ST XTA features an aluminum adjustable topmount allowing the camber and caster to be adjusted depending on your driving needs or vehicle setup. QA1 Mustang Single Adjustable Rear Pro Coil Over Kit - 130lbs (79-04 Matched Damper and Spring Rates The full driving behavior of your car can be adjusted using KW damper technology along with an adjustable aluminum uniball top mount for fine-tuning of the camber and caster ST XTA Adjustable Coilovers 2015 Ford Mustang | Sweden Mustang For those who demand the absolute best performance comes the ST XTA coil over. If the rebound force is increased, the car will drive with even more track stability and further reduced bodyroll. ST XTA coil overs feature KW damping technology which allows the suspension to be made either stiffer or softer depending on the driving conditions.