*bump*ajc6882 said:You can keep those tunes and buy more from [email protected]. My tunes are for stock setup with or without catback exhaust and/or intake. If you do headers or something more extreme you can get a more custom tune from Torrie. With intakes and exhaust mods you will see more HP and Torque gains. Probably better MPG too. The X3 will hold up to 10 tunes now it was updated a few months back. It used to only hold three tunes.