Originally Posted by robertm
So, what exaclty have you done to the exhaust system? No cats at all now and free flowing axle back? Meaning catless DPs, catless midpipe and free flowing axleback? Just trying to clarify what you did exactly. Also, are both dyno runs on the same software (beta 1) or is Cobb tuning the software for your new setup?
The dyno runs were using the same software--the "stage 1" which was installed in November. No additional tuning was done to accommodate the exhaust. My understanding is that the stock tune doesn't really recognize things like exhaust swaps--this tune was able to adapt to the increased flow.