To me that exhaust is not short. Shorter than stock yes, but if the ID is stock sized to fit thee stock header, it seems odd there is cold air making it's way back to the sensor.
Please don't read anything of an argument into my post. Penner is a great tuner and Paul a craftsman of great quality, I admit they know much more than I in these regards.
My only interest is my current cans are about the same length, maybe a a tad shorter and have been thinking of ordering a PC V/AT combo and could run into the same issue.
