General description The Damper Adjustable Coilover Suspension is designed specifically for the BMW 5 Series (E60) models from 2004 to 2010, including AWD variants such as the 525xi, 528i xDrive, 528xi, 530xi, 535i xDrive, and 535xi. This suspension system enhances vehicle handling and aesthetics by allowing for adjustable height and damping settings. Technical specifications Height adjustable: Yes, lowering range of 25-75mm Damping adjustable: 24 levels of rebound damping force Spring rate Front: 10 kg/mm (560 lbs/in) Spring rate Rear: 7 kg/mm (392 lbs/in) Spring length Front: 200mm Spring length Rear: 200mm Front spring inner diameter: 70.5mm Rear spring inner diameter: 70.5mm Spring preload advised: 7-10 mm Front damper knuckle insert diameter: 49mm (with bushing 55mm) Installation All modifications must be installed by licensed mechanics and in compliance with local modification regulations. Ensure all components are tightened with correct torque specifications before and after