28877 4 H&R Super Sport Spring Set F33 428i 435i Convertible 28878 2 H&R Sport Spring Set F30 320i 328i 330i 335i 340i, F32 428i 28878 5 H&R Sport Spring Set F36 428i 435i 440i Gran Coupe (RWD H&R 2014 BMW 428i M Sport Coupe H&R Special Springs, LP. H&R 2014 BMW 428i M Sport Coupe H&R Special Springs, LP.. Product Description H&R Springs Experience the H&R difference today Suspension is one of the most important factors in determining your vehicles day to day drivability. The first step in suspension tuning is to upgrade your vehicles stock springs. Upgrading your suspension components will ensure that your vehicle has improved handling and reduced body roll. H&R springs have superb ride comfort and increased driving convenience. H&R Special Springs are high quality productsthey will not set or sag, they are designed and manufactured to be strong, resilient, and more durable than other automotive coil springs. All H&R springs are crafted from a special (hf) 54SiCr6 spring steel to ensure premium quality and performance. H&R Springs are shot peened to increase their life by more than 200%. All production is completed in house so product quality is ensured. Each spring is 100% tested before leaving H&Rs ISO9001 certified production facility in Germany Features: Approximate Front Lowering: 1. 2 Approximate Rear Lowering: 0. 8 Lowers 1. 75 2. 3 on average Provides superior ride and maximum lowering Only from H&R, Super Sport Springs have all the features of Sport Springs, plus additional loweringgreat for the seasoned enthusiast looking for a little more. These high tech progressive springs retain superior ride comfort. The handling of your vehicle will be improved with a lower center of gravity. H&R Super Sport Springs give your vehicle the best looking performance stance. Note: Lowering varies by engine size and model Chassis: F32, Year: 2014 16