maXpeedingrods 2 Pcs Rear Air Suspension Coilovers for BMW X5 E53 2000-2006,Height Adjustable Spring to Coil Spring Conversion Kit, Shock Absorber Suspension Strut Lowering Kit, Gold - KJ084

• 【Fitment】Fit for BMW X5 E53 2000-2006, note: when installing, restrict falling off steps to face inside 【Spring Rate】Spring rate Rear: 5 kg/mm (280 lbs/in), Spring Preload: 7-10 mm, Rear: 440-507mm, 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 【Excellent Material】The product comes with 6061 aluminum alloy with T6 for increased hardness, high quality precision parts, high strength and durability. It is fully loaded and safe for installation