On my diesel truck, I have a chip in it. I can change settings on the fly. So, lets say I have it on the Econo mode, I can switch it to say the 140HP Aggressive tune. It throws lots of black smoke out which I sometimes use to blow at the clowns when I pass them. I am looking into getting cutouts so I can direct the smoke the way I want to.

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01 Ford Excursion Powerstroke
99 E300 Turbodiesel
91 Vette with 383 motor
05 Polaris Sportsman 800 EFI
06 Polaris Sportsman 500 EFI
03 SeaDoo GTX SC Red
03 SeaDoo GTX SC Yellow
04 Tailgator 21 ft Toy Hauler
11 Harley Davidson 883 SuperLow