From my research and help from others here are the 3 companies i would purchase full adjustable coilover sets from. There fully customizable meaning you can order with custom spring rates and custom bound/rebound valving >> Broadway Static Suspension/ Fortune auto/ AMR Engineering, all three companies are based out of the USA. I'll most likely purchase Broadway Static Suspension brand coilover set due to the integration of the muller suspension components "air lift cup system". With the Air lift cup you don't lose suspension performance cause the air lift cup is only ment to be used when needing to lift your vehicle, this is not an air bag system. Also the air lift cup acts like a spacer when air lift cup isn't being used. Imagine rolling on performance coilovers and when needed like during speed bump situations being able to lift your car at a hit of a switch then back to your low stance. This is a WIN WIN all the way around that I see well maybe i'm jus bias cause of the lift kit.