Chiptuning-FILE is the best tuning server on the web for caterpillar c7 ohe tuning files. all caterpillar tuning files are custom made and thoroughly tested on a 4x4 dynometer. the development of each caterpillar tuning file is the result of perfection and dedication by our programmers. many tuners in the world are working on Chiptuning-FILE because they are trusting our result.