I have 1450 miles on my L99 and have a Corsa Catback Exhaust.I did four 0-60 times today with it about 90 degrees.I had times that ranged from 4.82 - 5.32 with a stopwatch in hand.Two runs were with TC on and two runs with TC off.The best runs were with TC off. Mine feels like it is running just fine.I am getting ready to install a set of American Racing Headers and a TVS 2300 MagnaCharger.
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