Well I have a friend that has GENIII's and art pipes and a straight threw exhaust not sure what it is but when he went to get a tune his ecu didn't compensate enough for the mods and he was dangerously lean. So it is up to you if you only have the ART pipes then I would not worry about it to much but if you have CAI or full exhaust I would. I'm scared to drive my car because I have GENIII's and AAM 2.5 S-Line midpipe and muffler delete. But I have the software just not got a tune yet. So it's up to you if your strapped I saw wait unless you have other mods.
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 2010NISMO•305.9whp 250tq Osirus•STANCE GR+•and Camber & Toe bars•KICS R 20mm•VOSSEN CV3 20"-10.5x4•Stillen GENIII•AAM S-Line Nimso mid-pipe•CarbonSignal Sponsored car•EVOR F1mirrors•NST short shifter•Zspeed Nismo under tray.
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