exhaust question

[civicking]

I have a 98 civic coupe with a j32a2 swap in it. What size exhaust should I run on this for the best results? I also have headers on this engine with no cat.

[civicking]

anyone have any advice?? If not im probably going to just pick up a 2.5

[IDon'tKnow]

I know that with my application I will be running 2.5" true dual. However, in my case the exhaust will be very short, since it's mid engine, and therefor poses less of an issue with the exhaust pulse potentially cooling off, slowing down, and thus causing unwanted back pressure.
What is the diameter of your headers post-collector?