even though i have already bought my exhaust i was just wondering out of curiosity but what is the difference is sizes of exhaust (besides exhaust flow)??? especially like 2.25 up to 3 inch. i already ordered a SRS 2.25 catback for my 2000 civic si (b16a2) thanks

 

What? Is this a trick question?

 

If it was then I wouldn't ask it. I am just curious. I'm not trying to make it a difficult question. Who knows? Cause I don't. It might be the most simple, if not, stupid answer. I might have worded the question wrong...my bad I don't know

 

Your question is absolute nonsense the way it's worded. What is different between the sizes of the exhaust? How about...The size?

 

Wow dude that's all you had to say the first time. You didn't have to be a complete *** about it