NITRO X ADJUSTABLE CAR TUNING CHIP FOR VOLKSWAGEN Fox 1.4L ( all years ) This is a Nitro X fuel management and performance increase device with 15 ECU remapping settings. It has about 6 fuel economy programs and 9 horsepower increase programs. It is a very reasonably priced option for cheap guaranteed and safe car tuning. Installation is very easy and does not require advanced technical knowledge. Depending on the car engine the device can increase horsepower up to +20 BHP and torque up to 15%. Your car will be more responsive and pleasant to drive fast. The device DOES NOT require cutting wires of your car wiring harness or any kind of other modifications to work. It is a simple and honest device that gives what other expensive racing tuning devices fail to provide. It works only in petrol (gasoline) fuel injection engines but it DOES NOT work on diesel engines or carburetor equipped vehicles. The Nitro X chips increase the horsepower of a car engine in % proportion to the original horsepower the car engine can produce. For details on power gain and detailed installation please visit our home page and click on the relevant link. It works on all years / models of the car in the title.