The Koni Sport (Yellow) Shock 14-15 BMW 228i320i/328i/428i/435i w/o M-Technik - Front is a high-performance shock absorber designed to improve the handling and stability of your BMW 228i320i/328i/428i/435i without M-Technik. It features a patented FSD (Frequency Selective Damping) technology that allows for improved road holding, improved comfort, and improved performance. The shock absorber is crafted from high-quality materials and is finished in a bright yellow color that stands out from the factory suspension. It is backed by a limited lifetime warranty.