I have a 2001 S4 with a open air box and Arrow slip-ons. I also went down 1 tooth on the front sprocket. I live at a altitude of @ 7,000 feet. With out getting into the motor does any one have any ideas on what my best bang for the buck should be? Any one have experance with a power commander at high evevation? Any other ideas for a cheep mod? I just dropped a load of cash on new rotors so I'm a little tight on money. Any help would be great.

Mike