what header for b16a motor?

I have a 90 teg that i installed a b16a motor in it and i want to get a header for it ,what would fit and whats the best one to get for it? also what would i have to do to make it fit?

You can pretty much use any b-series header you want. But unless it is made for a 90-91 integra, it won’t connect to the cat perfectly. If you’re getting a custom exhaust put in at the same time then it’s no big deal because they can make it fit for you.