I was looking into getting GPS, is there anything out there that could be programmed into the dash computer? I was also looking for some things that could increase performance, but also save gas on my 03 MOntstero..

 

Not much difference in either category, but high flow air filter or aftermarket intake, tune-up with better plugs. I hear that the piggyback's give slightly better fuel mileage as they lean out the air fuel ratio a bit. Try searching for a Jet-chip, I know they make them for your application. I'm sure someone with a wealth of experience will be here shortly to help you more.