The best thing to do is to look at the DTC list, sure takes the guesswork out of this:



SRTs do not have EGRs. For those of us who do have them, the symptoms are:

EGR stuck closed: Better performance, less throttle delay, higher NOX emissions.
EGR stuck open: Rough idle, less performance at all throttle settings, lower NOX emissions.

I've had issues with the EGR in the Graphite Roadster, mine stuck closed, car ran so much better, I put an EGR disable switch in the graphite and also have one in the SE.
Given that the SRT6 does not have an EGR, I am questioning just why you would get these codes. Are you SURE the codes are not P102 and P104?