[Official] "Do I need a tune with bolt-ons?" thread

[BLK N-Z34]

I recently installed AAM Resonated Short Tails, Stillen Gen3 CAI, and ART Pipes. I was running with the Short Tails and CAI for a few months before I installed the ART Pipes and didn't have any issues throwing codes. Now that I've installed the ART Pipes I'm throwing codes for both 02 Sensors reading too lean. My car is still fairly new and only just passed the 8,000 miles mark. I won't be able to get the car tuned until the end of the year. Is it safe for me to drive the car with the mods installed or should I re-install some of the OEM parts to be safe? Reading through this forum I've seen mixed responses. Some people say that it should be safe and others say that the A/F ratio could be thrown off really bad. Is it possible that the ART Pipes are reading the A/F mixture incorrectly due to the 02 sensor placement? I'm just trying to be safe and ensure that I don't damage my vehicle. Any help is appreciated!