Evening folks.
Has anyone tried a tuning box on the 40d engine? I've had tunes from the likes of DMS before but the ECU remains locked for now on my model year, so a box it is.
In the U.K. the choice is pretty much DTUK (rebranded DTE boxes) or Racechip. Both cost roughly the same and offer similar gains, just interested to hear whether anyone has any direct experience with either?
Cheers
