You can do it yourself, its not hard at all. I installde my nex's in a couple of hours. Do teins come with the top pillow mount, or do you use the stock one? If you have to use the stock one, you need to get a strut compressor to remove the top pillow mount off of the stock shock/springs. Then just install that on the teins, and bolt it in the car. If they come with a top mount, its even easier, just unbolt whole stock assemble from car, and bolt in tein assembly. thats it.