Has anyone tried this? https://www.squaredeals-ltd.co.uk/t...he-power-just-plug-and-play--enjoy-4687-p.asp Apparently "The BoosterPlug will trick the Fuel Injection ECU to think the air temperature is lower than the actual readings, and the ECU will richen the injected mixture by a certain amount".
There’s quite a few places that sell these but afaik, they aren’t really designed to increase the power in a meaningful way. They’re designed more to smooth out any part of the map that might be a bit lean. The best explanation of how they work can be found here https://www.boosterplug.com/shop/cms-24.html
You could achieve the same by adding a resistor to the air temp sensor its just another global fudge device.