Quote:
Originally Posted by King Tut
I would say that a properly catted downpipe and properly placed O2 sensors could allow you to pass emissions testing. You don't have to have a dyno tune, but you need a good tune which means you need to datalog it and have corrections made to the tune based on your setup. A good tune is worth any amount of money or any distance you have to drive to get it. I would say making the drive to HRI Tuning would be worth it for you.
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Also, find out what is needed to pass emissions in your state. Modding turbos and emissions is a big thing on the VW side of things. ECU tunes, down pipes, upgraded turbos are all options but they mess with your car's readiness codes or can cause CEL's.
Some tuners have tunes to turn off the CEL but they merely mask the code on the ECU but it is still there being reported on OBD-2.
Depending on your tune and state you could play with O2 sensors as mentioned but it's tricky or you can try some of the more drastic things that some VW guys do like swapping downpipes back to stock when state inspections come up.