Originally Posted by bmwm5lover
Look at MarkD software, I've been meaning to get it for my car, but 400hp has been keeping me plenty entertained.
As for the exhaust, before you spend $$ on an aftermarket muffler, try the muffler delete mod with exhaust tips. You will be surprised at the result and so little money.
Sounds tempting - I'm not all that comfortable with my ability to carve up the exhaust system though. If I were to bite the bullet and go for an aftermarket system, is there one that is generally known as superior?