00 Honda Civic EX....4dr?

Danger Hot

New member
I installed an AEM Cold Air Intake, aside from that, all was stock.
Exhaust and muffler are the next ones I want to upgrade.

Should I replace the stock exhaust system or just the muffler so that I will gain more HP?
Everybody says that putting in Cold Air intake must come with exhaust too. But Im confused, so should I replace the exhaust system or only the muffler to Flowmaster, Magnaflow or Catback?
EDIT:

Ok, but what would be the difference between my stock exhaust and that Magnaflow exhaust system?

I mean, inlet size, outlet size? what is the main advantage if it is a magnaflow?

Because I could buy cheaper exhaust system, if only the size of inlet and outlet is giving the extra HP?
 
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