Those chips are just resistors. They will work for a short time n then OBD II software will adjust and "dumb down".

Get your basic bolt ons -intake, headers,catback and if you need more power get some re ground cams and a piggy back for tuning. Headers may be hard to find a forum member used to sell them but I dont pay attention- Ive got a second gen n should get my headers soon Im just waiting for the shipping quote.