E
elmo-S15
Guest
hi.. i have been searching through this forum but i havent found one. so better i post. what is the oem piping exhaust pipe from the converter to the catback? 2.5 or 2.75? 
owh thats quite small.. is that for the spec R? i thought the turbo car got a large pipe.. thanksapprox 2.25" outside diameter and 1.75" inside diameter. I measured this just after the joint behind the cat converter. It's quite small once you take off the heat shield.