? about exhausts - Toyota Yaris Forums - Ultimate Yaris Enthusiast Site

05-19-2007, 04:12 PM	#2
FlyingDevil Drives: 07 Corolla Join Date: May 2007 Location: Maryland Posts: 30	i think on the old american muscle cars (and new mustangs), u need to get a tune to get the full power from an exhaust and an intake mod... but for the yaris, i dont think u need a tune for just an exhaust... if u want just restart the ecu and let idle for 10min so the ecu can relearn the a/f ratio again (but i dont think it matters for an exhaust, but intake it will)

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