Exhaust

I have a 94 Integra RS completely stock. Except I just recently put on my Hyaumi Type 2 Exhaust and had the Cat removed. I wanted to keep some back pressure but also free up for performance. I'm new to all this (obviously) tell me how well of an idea that is to do what I did and keep stock piping and just take off the cat and put on the new muffler?? Thx for ur posts!