Ok, i know 2.5' piping exhaust is good with 2.5' collector header, but would it be good if i use 2.5' piping with a header that is not 2.5' collector? And is it true that 2.5 crush bend is almost like 2.25 mandrel bend? thanks....

 

anybody?

 

good question i did a b18c swap in my 89 crx this weekend and nobody has and mandrel bends around here. you can order them from summit. I just got mienike to do what they can. I waiting on it right now. I figured I could get mandrel bend later and add them on if necesary. I went with 2.25

 

So, do you think it make sense to put 2.5' exhaust on a header that is not 2.5 collector?