S4RK Lock Kit for BMW E39 Specifications Specially designed by S4RK this kit is the ideal solution for improving the steering angle of your BMW E39. The new geometry provided by S4RK raises the vehicle's roll center improving cornering stability steering precision and traction.Increased steering angle: significantly improves handling and vehicle control up to 70° Precision CNC manufacturing: consistent quality and perfect tolerances ensuring reliability High-strength materials: exceptional mechanical durability even under intensive use Uniball joints: ultra-precise and responsive steering Kit Contents Suspension wishbones Steering adapters Steering ball joints Screws and accessories required for assembly BMW E39 ApplicationsM47 (520d)M51 (525td 525tds)M52 (520i 523i 528i) M52TU(520i 523i 528i) M54 (520i 525i 530i) M57 (525d 530d)Not compatible with V8 models (535i 540i M5)