Ok car is shifting good But am I missing anything. ..I still have a harsh power downshift From 6-3 or 5-2 But i just tap down now. And I keep seeing what I think is false knock in the 4100-4800 range.
Car is a 2013 zl1. Full bolt on. 2.45 upper . 9.07 lower.. headers no cats..corsa 3 inch exhaust ... Gp tuning 2.5 cam Id1050x injectors .. k&n carbon fiber intake.

