I have a 03 Honda Civic EX. Its my first car and I love it!! I have a cheap ebay special intake on it. It gets the job done and adds a nice little sound. However I would love to get more performance and a sweeter sound too. My question is the stock exhaust is 1.7in diameter and the aftermarket Megan Racing cat back exhaust I want to install is larger about 2.5in so would I have to get some special part for it? It says it is a bolt on application does that mean it will bolt right up to the catalytic convertor.
Thanks for the help guys!

 

if you buy the correct catback set for your car then yes, it shold bolt right up. you may have trouble removing the bolts from the cat, so just watch out for that. they're tricky sons a bitches