I am preparing to do my first real modifications on my '98 V6; I was planning on Flowmaster dual exhaust, cold air intake, V6 headers, and a chip. My only problem is I am paranoid that I'll spend the money, then find out my car no longer can pass an emissions test. Some people at the local Ford garage have told me it will not pass if I do this. I can see a lot of you have modified your V6's, have you had any problems with this down the road? Yes, I admit I have driven my car basically stock except for a K&N for 4.5 years.. sorry.. with the new 2005 V6 leaving me even further in the dust I figured it's time to do something, but this is my only car so if modifying it will not let me pass the tailpipe sniffer test then forget it. Has anyone else had any trouble with this?