This is the way I look at it for someone (I was one) who has all the cats deleted regardless of sims or ECU..
Will your truck pass?
NO!!! no matter what you tell yourself it will not pass!!!
1. Regardless of the situation you have modified your emissions system and rendered it useless.
2. You have installed OFFROAD parts on your vehicle. these parts are called off road because they do not meet emissions and carb standards. they are not "legal" for street use.
3. It says in the item description they are for offroad use only, meaning you buy these parts knowing that they are not street legal.
4. To avoid a CEL you have to trick your ECU to think it is running "clean" to avoid a CEL.
5. Even if your area is emission exempt your car still fails because you modified the emissions system on your car which is illegal for any vehicle that is used on the street.
If your failing vehicle pass's it did not really pass.. How so? Your inspector failed to do there job correctly and passed a failing vehicle.
That is how I feel on that..
Now I myself had a truck that fit all of these conditions. Every time I had to do my inspection I would simply hope that they didn't look around. It was quite easy to pop the hood and see a big turbo kit and wonder how it all was run and know that it was not from the factory. I never once had someone question it or ask "will it pass?" I knew the answer was "no it will not pass". I simply hoped the guy doing the inspection doesn't know that.
If your CEL is off and your area does not do a sniffer test go get it inspected and see what happens. For the most part you will be fine, but if they look who knows the outcome. if your CEL is on OR they do a sniffer test you better find an alternative method of put your stock parts in place.. once you put headers on more than once you can get them off and on in a matter of 30 minutes or less. when you buy headers and other parts that fall into this category you know before you click "add to cart"
this post should be stickied for the questions of "will it pass?" lol