Coilovers Suspension Lowering Kit Fits for BMW 3 Series E90/91/92/93 2006-2011 Adjustable Height 70617463Features: Adjustable ride height and pre load spring tension. Pillow ball top mount this design helps combat noise while tuning. It also improves the steering feel and response. 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. Most components are made from 6063 aluminum with T6 for increased hardness the