Is it better to get a muffler that has the same size inlet as your piping? I would think if you get a muffler that has the same size inlet as your piping, then it would be a better setup maybe

I personally have 2.25 piping to an N1 with a 2.5 inlet. Ive been looking for a new muffler for a while, so i just wanted to get any advice/input in advance.

Thanks.