5 series

My car is so much better after tuning. It responds a lot better and the power gain is more than noticeable. And the best of all, the whole thing was done incredibly quickly. I’ll tune every car I buy for sure.

I decided to upgrade my car, but with so many bad tuners out there it was not an easy decision. A friend recommended CTF to me and I can’t be more grateful. My BMW is faster, more responsive and a joy to drive.

Perfect tuning files, great prices, incredibly easy and quick process of getting the files and a great support from their staff. My life could have been a lot easier had I found you guys earlier.

Best chip tuning files on the market. I’ve already used them on a number of cars and I still haven’t had a single complaint from any customer.