So.... I'm wondering if there will be another 4 page/68+ post thread for when that CEL comes on shortly, due to the gutted cat? Or maybe they'll start 3 threads?
To the OP, you know you could have just unbolted the cat, to test it, right? And then, replaced it with a universal replacement, fairly cheaply. So cheaply in fact, that, had you not destroyed it, the scrap value of the bad oem cat would have almost paid for a new aftermarket replacement (at least the cheapy universal ones.) Instead, you will still end up needing to replace it, and you destroyed the old one, throwing away.........wait....for.....it..... PLATINUM and other valuable precious metals.
Oh, and yes, Hawaii DOES have emissions laws. Last I checked, it is still a US state, and therefor, the FEDERAL Clean Air Act applies. Now, I don't really care if you break this law. However, I do care that you are misinformed/misguided about what the law is.
Also, leaving the cat gutted, long term, is not a "fix". It will turn on the check engine light shortly, and your fuel economy and performance (especially low end torque) will be reduced. Based on your previous posts, I doubt you would understand the explanation why, so I won't bother. Just know it's true. You need to either install a new cat, or replace the gutted shell with an appropriately sized piece of pipe. (This will not be a "popular" solution, but it is far better than leaving a gutted cat.)