Dartford bound to tune this beautiful M3, not massive gains to be had from these already tuned V8's but a noticeable improvement in throttle response and overall drivability once the modified software is wrote to the ecu.
These are a long read and write time extracting the original data and writing the mod file so if you are thinking of having yours done make sure you have allowed for plenty of time in the day for the work to be completed!
A noticeable improvement in throttle response and overall drivability on this beautiful M3.
Original = 420 BHP - 400 NM
Tuned = 439 BHP - 430 NM