I could install the cutouts after the post cat sensor but I wouldn't get as much benefit and I have some concern the cats are going to an early death because I am pushing so much through them when the nitrous fires. I agree that probably the only way I will find out for sure about dash warnings is to do the installation. And, do it in a manner I can move move them if I have a code problem. I don't recall anyone that has eliminated the resonator having a problem with the dash lighting up from emission readings from the post cat sensors.

Nope no issues with resonator delete, will be looking forward to seeing what you end up doing!

Bcredliner, it took a good day or two before the system saw that there was no cat when I was running catless. If you put a cut out right before the cat, and run it randomly, you may never see a code. Plus, even with the cut out open, the post o2 sensor would still get some flow. I bet you'd be golden.

Thanks for the input! Next step is to find a place that will allow me to bring in my parts and can confirm they can work with what I bring them---don't do welding and don't want to use exhaust U clamps.