alright so my 04 cav is a california emissions vehicle. my local exhaust mechanic told me that if i were to put headers, a hi-flow cat, and cat-back exhaust that the extra air flow would trip my CEL because of the california emissions. is this true? and if it is, how do i bypass it? sorry for the Newbie question... im not very good with the computers of the car as all of my past projects were older and simple. lol

people in cali do it all the time.. lol no lights.

Space out the rear O2 sensor with 1 or 2 spark plug anti-fowlers.

How-to.