Why are you making this difficult? You have a DP? Just go stage 2? What the hells the point of have a stage 1 map, when you have everything you need for stage 2 and it cost the exact same amount? Gains are better, the car will be designed to run with the DP, and you can have the CEL removed.To get a clear answer I emailed APR and the shop that tunes to get a clear answer. Here are their responses. They solved my question.
We can get you a stage 2 non test pipe file. Or Stage 1 test pipe file. That is up to you. You will get 4out of 5 readiness codes, please check with your state emission board on how many readiness codes you need. -apr
From tuner.
If you have a downpipe then you would want a Stage 2 file. If we flash the test pipes file it will turn off the readiness on two different monitors. We can load a file that turns the readiness on in Stock mode but you will still need a O2 spacer to prevent the CEL for cat efficiency from popping up. So whatever file you'd like to do is fine. It just depends on what you want and how you want to work out the emissions aspect.
So I can get a stage 1 with a testpipe file
Just go S2 and save everyone from this silly ass topic.