5S-FE Exhaust question (not related to cat-back :))

[TadS]

I have a hole in my flex-pipe on the front half of my exhaust. I have decided to replace the whole pipe from the manifold to the cat-back as it has over 120k miles on it. Does anyone know the OE size of the pipe is? I want to say 2.5in, as my 60mm Apexi WS piping is pretty close in diameter. Also since I am also replacing my catalytic converter do I need one with or without the air-tube? Best I can tell there is none, but I want to make sure . Thanks guys!

[initial-T]

the 4cyl uses a 2 inch piping.

hmm...just go to Bosal and get some new aftermarket stuff.

[initial-T]

nah, 4-bangers are the little 2".

[initial-T]

Originally posted by UfoZ8myCow
im switching it all out for 2.5" anyway.

yes, give your turbo some breathing room :P

[TadS]

I thought the downpipe was bigger than the cat-back part of the system? The OE catback is 2" I am pretty sure .