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      01-30-2012, 06:49 AM   #28
GreeKon
It ain't gonna suck itself
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Drives: 2010 M3
Join Date: Jan 2012
Location: Philadelphia, PA

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Quote:
Originally Posted by dbyrd View Post
Will the engine run optimally without a tune even though the O2 sensors will be malfunctioning?
I was thinking of doing the TTP mod as well...but I was told without the tune...that gas mileage would be horrible, as if it already wasn't

I have the OEM exhaust mod done...the car sounds AWESOME, but 30+hp and a louder exhaust is VERY tempting, lol. I have to really think this through.
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