Hello everyone, i am brand new to the SAAB community. Recently I decided to trade my mustang and a guy with a saab wants to trade. I like the car and want to, but one thing errks me. The car is a 2003 SAAB 9-3, but has an 04 9-3 aero engine in it. The car makes 18 pounds of boost, but after 15 mis fires and studders In all gears. He keeps saying is has a turbo off of a new saab, which is why it makes more boost. I have looked of forums and don’t see evidence of turbo swaps. He took the car to firestone and they looked at it and said it was the ignition coils’ fault for the spuddering, but that still doesn’t answer my question as to what turbo is it? How is it making more boost? Does it need tuned?