You are right Tom .. Its pretty damned nice down here,, but I have a friend with an m3 adn he installed a cold-air set up for it and he reckons it made a pretty big difference. In summer its like 35++ every day so gains will be less.
Tom, (or others) can you recommend a well regarded chip tuner ? I think with BMC and mufflers, a chip makes good sence ,,, problem is which one ?