X2..There are alot of things the aftermarket offers car owners just to make money.this used to be a trick in the early days of electronic fuel injection, but it never really worked.
the idea is the ecu will think the air is colder, so it will send more fuel, and some will up the timing a bit. 99% of the time you lose gas mileage and hp. what a lot of people did before there were options to tune an ecu is used this when using a power adder such as a turbo or nitrous so that the engine wouldn't lean out.
basically you are going to spend money to make your car run worse