Great thread to find thanks to Google. Sooo just picked up my Z. Has ART pipes and stillen exhaust. Had such a nasty rasp I bought greddy Evo RS single and..... Boom still there but improved. I wonder what version pipes the owner before me got from dynosty...? I'm considering buying a cheap y pipe and adding 2 resonators to see if that gets rid of it. Next move is longtube headers which isn't the cure but a win win.
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