CRX Exhaust Question

i have a crx and i bought one of those universal mufflers, i havn't taken the old muffler off yet, before i get under there i thought i check if anyone here knew the diameter of the crx exhaust pipe so i can get the right size adapter for it.

I believe it is 1 7/8

lol run 2" or 2 1/2" piping be good if your putting that thing on...fart can nasty...lol...unless you have the power back that up