What RSTunner firmware & cal files?

[Just Plain Yates]

Hi,

I installed a rstunner .cal file (6400_2A07) on to my CB1N ECU. I didnt install a .rst file as I already had 6400_5402 files installed. All is fine and the car has more low down tourque.:race:

But, has anyone installed a different/newer .rst file e.g. 6500_xxxx, with required .cal file, and noticed any difference between the two .rst/.cal files (6400/6500)?

Thanks.