hi I have 07 civic ex sedan, am looking for exhaust.
but I realized that I have only few options for my car.
so I am considering greddy ti-c or vibrant exhaust.

Also,I heard that the extension is needed for greddy ti-c, and somebody said that I should weld the extension. is it true?

please give me any recommendation for exhaust. thanks.

 

I would go with a 60mm because anthing bigger wont help unless your turbo'd. Yes welding it would be a good idea, usually with the sedans you need an extension if you have an exhaust for the Coupe. I am assuming your buying the exhaust for a coupe? If not then I would assume that the exhaust for the sedan should be the right size. Correct me if im wrong H/T.

 

greddy se ftmfw!!!

100miles+, yes you're right. you need the exhaust extension which greddy sells for like 60 bucks i tihnk, which is too much imo, but u can run the coupe exhaust on the sedan without the extension, but the tip of the muffler will be tucked underneath the bumper instead of sticking out like it normally does