1987 Ford Bronco Legal or illegal?

So I recently took my muffler off my 1987 ford bronco II. It's a v6. 2.9L. I love the it sounds now. But the only thing I'm a little concerned about is if it's illegal. Some people say it is but a lot of people say if I t's below the year of 1994 or something like that it's legal. I have a pipe on my cat then I put a exhaust tip on. It sounds really good. Bit I just need to know of it legal for me. Like I said it's a 1987 old bronco truck.