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Old 03-15-2013, 10:03 PM   #3
sleepyboy
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I have a tune and I have been passing with it no problems. Now that's not to say you would, some do and some don't. The only thing you could do is to try it, if you fail then flash the stock tune back on and give it another shot. Just make sure that if you get rid of the EGR or something else emissions related that you have that on hand in case you need to put it back on the car. I left my EGR on for a while till I knew for sure I could just pull it off and still pass. It's been a few years now with no problems. Before the tune I would use a MIL eliminator on my long tube header since I had no cat and I always passed that way as well.
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