eg6_vti93

ok so as in title im looking for a new s/s exhaust system for my civic eg6, im basically wanting to no on sizes for the inlet and outlet as i keep seeing 2" 2.25" and 2.5" ones and was wondering what would be the best match i.e if i went for a 2.25" system would the outlet on my cat need to be 2.25"???

accorse07

No matter the size you choose, you want the piping to go out one size or bigger all the way out. ex:2.25 collector/2.25 b-pipe is ok 2.5 collector/2" b-pipe bad

eg6_vti93

so i need the same size collector as the b-pipe then so for example if i get a 4-1 mani with a 2" bore outlet i'l have to have a 2" collector on my cat??