I tried searching for this information and couldn't really find anything specific I have a 07 BFII (build date 07/07) XR6T just bought a SCT flash tuner box and I'm about to send it to CAPA to put a tune in it and unlock the VIN. The car is dead stock (except the middle muffler has been removed). My questions are Using the stock injectors, what would be a safe level of boost to go up to and what would be maximum (keeping in mind everything else is stock)? Is it difficult to change the injectors? With the edit box, I was promised that it has been returned to standard tune so CAPA can unlock the VIN. Is there any way that I can confirm this? (as I'm considering shelving the box and do the intercooler, injectors and actuator then getting a tune but if the seller wasn't telling the truth then I can lodge a paypal dispute). I'm not expecting miracles without $$$, but I want to make sure that I'm getting the most for my money... I'm hoping that 10-11 psi is the answer...