Bilstein B6 90-99 Spartan EC2000 Rear Monotube Shock Absorber - 21.61in Extended Length 2023-bmw-430i-gran-coupe-esi7212625 Unlike competitor multi-sectioned airboxes

Unlike competitor multi-sectioned airboxes

and should only be attempted by professional builders

Radium's Fluid Lock system features an internal baffle design that prevents collected oil from sloshing out of the catch can during hard cornering

Engraved COBB Logo

Direct port OBDII at-home flashing

Bilstein B6 90-99 Spartan EC2000 Rear Monotube Shock Absorber - 21.61in Extended Length 2023-bmw-430i-gran-coupe-esi7212625 Unlike competitor multi-sectioned airboxesBilstein B6 shock absorbers and struts are the ideal choice for improving the performance of any vehicle. These shock absorbers and struts feature a monotube design which provides consistent fade free performance. Bilstein B6 shock absorbers and struts utilize a unique, velocity sensitive, digressive piston which reacts to changing road conditions to provide consistent fade free performance. All B6 shock absorbers and struts are tuned for each