seeeing as you said its stock .
Why even bother with the reflash sure it will be revised fuel and ignition values with REV limit and even the VTEC point is not altered.
Just go a K-pro and only if u got actual mods on the k20 not just stock.

Seems like your wasting money on (reflash)something that not really going to bring any real benefit if the motor or dc5 setup is stock.