Shop around an little but about $250, I get most of my stuff at tuner tools.com they have pretty goods deals. You need a laptop to run the program and change to output curve.
Whats an echeck? In Cali. we need like 5 outta 7 monitors past and pass on emissions. After doing all this I still ended up making a set cats on a removable section of exhaust for smog and cause my inner tree hugger kinda felt bad about mashing around with no cats.