Installation can be performed by anyone using simple hand tools. The GF module installs into your SUZUKI SAMURAI's engine bay and is connected via 2 wires that plug into the IAT sensor. Diagrams are included. The unit is then able to reprogram the ECU thus improving your car's performance. Everything needed for installation is included in this kit for a quick and easy installation that shouldn't take more than 15 minutes. There is absolutely nothing else needed to have this installed on your vehicle
Quote taken from
here, highlights are mine.
What that does is trick the ECU by telling it that the intake air is colder that it really is, so that it richens the mixture to compensate.
You're NOT going to get anywhere near to 60HP more (did you notice it says "upto"?), you're NOT going to get any more miles per gallon (you can't use more fuel AND increase the mpg), and you're NOT going to reduce pollution (you're burning more fuel, you're producing more pollutants)