I have a 95 Nissan Sentra SE and I just bought a Pacesetter CATBack Exhaust and Headders with a Hi Flow CAT. Not relizing it when I went to get it swapped I noticed that my car had a different exhaust on it. i check out the VIN and found out that I had a California Emissions car and the only Hi flow Exhaust, headders, and CAT I could find were for Federal Emissions. By swapping them out are there any computer/sensor changes that Need to be done? Any help would be greatful. Thanks.