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I got high flow cats with my longtubes but I quickly switched them out to offroad pipes. If you want them I can sell them to you for a good price, but I doubt you will since they are high flow and 3 inch in diameter.
504700

I've heard of some people adding some e85 to their mixture before a sniffer test. It will lean you out a little but as long as you don't go wot and be smart about it you should be okay. Not sure how much it will help.
 
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