Whats your thoughts on how these work? apparently there all quite universal, so what is it doing to the data stream from the OBD port?
http://www.ebay.com/itm/Benzine-Cars-OB ... 1614228918
• A Plug & Drive Ready device to increasing the performance of engine for Benzine Cars
• 35% More Power, 25% More torque. Recognize your car's model and driving habits, Then adjust itself to match your car perfectly
• Compared with the Remapping tuning methods, the Chip Tuning Box is easily removable, after unplug you go back to the factory settings. It is the cheap and safe type of tuning
• Universal fits, Does not damage the engine, the car and the computer ECU. In a word, it will not cause any negative effects to the car factory setting
• NitroOBD2 produced on the printed circuit board in SMD technology. High quality and pass CE / FCC / RoHS
• Size: 50mm x 30mm x 25mm
• Color: Yellow
Package Included:
• 1 x OBD2 Performance Chip Tuning Box
