maXpeedingrods 2 Pcs Front Air Suspension Spring to Coil Spring Conversion Kit for BMW X5 E53 2000-2006, Coilover Shock Absorber Suspension Strut - AC31KHD

• 【Fitment】Fit for BMW X5 E53 2000-2006, note: when installing, restrict falling off steps to face inside 【Spring Rate】Spring rate front: 8 kg/mm (448 in/lbs) Spring Preload: 7-10 mm, Front: 421-556mm, Hi Tensile performance spring - Under 600,000 times continuously test, the spring distortion is less than 0.04%. Plus, the special surface treatment is to improve the durability and performance 【Excellent Material】Most components are made from 6061 aluminum with T6 for increased hardness -- the advantages include excellent strength, and aluminum helps keep the weight down 【Twin-tube Structure】Compared to mono-tube construction, the twin-tube has longer stroke and higher height adjustability, and they will give you a more comfortable riding experience by reducing the pressure on the joints and also minimizing friction and ensuring sufficient travel with less effort 【Lowering Kits】The height adjustable by 1-3 inches, allowing you to have a more aggressive stance. This design helps eliminate turning noise and also improves steering feel and response.(NOTE): These coilovers struts will "Lower your car" and does not keep to original ride height