ST 182100AV Coilover Kit ST XA AUDI A4 (B9); (B8, B81) 10/15- test123 BMW Z1 1988-91

BMW Z1 1988-91

or optional Borla tips may be used

J-form threads rolled after heat-treat — 2000% stronger than standard threads

The system does not include NPP valves

manufactured by the same people who currently supply BMW M sport and Mercedes Benz for all their engine calibration and Dyno testing

ST 182100AV Coilover Kit ST XA AUDI A4 (B9); (B8, B81) 10/15- test123 BMW Z1 1988-91ST 182100AV Coilovers ST XA galvanized steel (with damping adjustment) The ST suspensions XA coilovers are engineered for drivers requiring both ride height adjustment and customizable damping characteristics. Developed in collaboration with KW Automotive, this system incorporates advanced damping technology that allows precise rebound adjustment to suit varying driving conditions. Damping can be adjusted directly at the top of the piston rod,