my air filter is pretty much right on the end of the 4 inch maf housing, so within inches of the sensor, i know the distance i have between the sensor and turbo is good, so you may be right. I just got off the phone with chris from C2 motorsports, I am unsure of how old the version of the Stage 2 #42 software i have is, so I am sending him my ecu to get it retuned, I am going with the Stage 2 RACE file, and having a couple things adjusted. Hopefully that will also clear up any issues!