it allows a fatter fuel trim is why,it wont add a hundred horse but it helps especially with aluminum heads higher heat helps emissions which i dont care about.
disconnect the battery,run lucas in the tank (the fuel treatment lucas) it has top cylinder cleaner and lubricant,careful not to put it in a storage that has woods or a field close by,put rat poison down and get a car cover.
as long as the computer is cleared 5 10 15 2 weeks dont matter as long as its clear it WILL pass,i cleared mine in the line waiting for the inspection and didnt have a single cat on the car.
just what i thought i sent him an e-mail saying (Received the springs today but got the wrong ones,Eibach sportline springs have their name on them and part stamp,im going to need a refund on these,they appear to be dropzone springs,Thanks Steve)