I keep looking for catalitic converters for my H22 swap in my civic. The only problem is that I have only found 92-96 high flow cats. Are the header flanges for the 92-96 & 97+ the same....or are they different?

Cuz I wanted to get a 92-95 cat, and then just get an exhaust shop to add the 2nd Oxygen sensor hole.

Are they the same??

Thanks,
Mark