Here is some more info about this mod, it's got something to do with altering the crystal's Mhz in ECU
http://www.magnumtuning.com/kepgaler...?termek_id=686

http://www.magnumtuning.com/en/produ...ontrol_module9

would it work even in theory?

@ richardsracingmad I don't even own a XT yet but i'm thinking about buying one