Mod files
A calibration that has already been modified from the factory original. 5 files, each matched by the number on the module.
What is a mod file?
A mod file is a calibration that has already been changed from the manufacturer's original. You are buying the finished file, not a service: it downloads immediately, with its checksum intact, and it is yours to work with.
Shops buy these for the same reason they buy an original — to save the hours. Reaching a given calibration from a stock file means reading the module, finding the maps, making the changes and rebuilding every checksum. A file that is already there is a starting point you can inspect, compare against the original, and adapt.
Like everything else here, a mod file is matched by the number on the module. A modified calibration built for one ECM code does not belong in a module carrying a different one, however similar the two trucks look.
What you do with a calibration, and whether it is permitted where you work, is your call and your responsibility as the shop doing the work.
- A prepared starting point instead of building one from scratch
- Comparing against the original file to see exactly what moved
- Shops that already know the calibration they want and just need the file
- Original (stock) files — the manufacturer's own calibration, exactly as it left the factory.
- A2L description files — the map of a calibration — names and addresses, not a file you flash.
Questions
An original file is the manufacturer's calibration, untouched. A mod file has been modified from that original. Both are supplied the same way — matched by ECM code, downloaded straight after payment, checksum intact — and both are listed with the number they belong to.
Yes, it is an ordinary calibration file. Bear in mind that once you change a byte the stored checksum no longer describes the file, and the tooling will refuse it — the checksum tools on this site rebuild it in seconds.
Match by number, not by model. The ECM code, part number or software version printed on the module is what identifies a calibration — two trucks that look identical can take different files. Every listing shows the number it belongs to, and the search box at the top of the site searches those numbers directly.
A download link for the calibration file itself, sent to your account and by email as soon as the payment clears. There is no waiting on us to prepare anything, and you can re-download it from your account later.
Yes — files are supplied as read, with their checksum intact. If you then edit one yourself, the checksum will no longer match your changes; the checksum tools on this site rebuild it for you in a few seconds.