The Bilstein 19-21 Audi Q3 B4 OE Replacement Shock Absorber - Rear is a high-performance aftermarket replacement shock absorber designed for the 19-21 Audi Q3. This shock absorber is a direct fit replacement for the original equipment and is engineered to improve ride comfort and handling. It features a monotube design with a 46mm digressive piston that provides consistent damping performance, and is constructed from a steel body for increased durability. This shock absorber is designed to improve the overall driving experience of the Audi Q3 and is a great option for those looking to upgrade their suspension.