The Koni Sport (Yellow) Shock 14-15 BMW 228i320i/328i/428i/435i w/ M-Technik - Rear is a performance shock absorber designed to provide improved handling, stability, and comfort. This shock absorber utilizes a unique progressive rebound design that provides a soft and comfortable ride, while also providing increased stability and performance during cornering. The Koni Sport (Yellow) Shock is made from a durable, corrosion-resistant aluminum alloy and is designed to fit the 2014-2015 BMW 228i320i/328i/428i/435i with M-Technik suspension. This shock absorber is designed to provide improved handling and performance while also providing a smooth and comfortable ride.