noob question

99 civic ex
jdm b18c5
tanabe RM (2.25 piping)

i want a catback that offer a 2.5 piping system and a quiet exhaust like an es oval or something similar

my question is, if that the set up is possible, would i loss any hp or airflow going into a smaller exhaust?

or should i just keep the tanabe and get a bigger pipping?? no straight pipe

your help is greatly appriciated

*sorry about the spelling.. drugs really got to me"

 

I have the greddy evo on my 00 ex and I love it. I believe it has 2.5" piping.

 

greddy sp2 would be good. its quiet and its straight thru shouldn't lose any hp or anything

 

apexi world sport is nice and quiet but i'm not sure if it is available in 2.5".... Also, the es oval is not a quite muffler.

 

the reason i want a 2.5 is because my collecter is that size.. the stock jdm 4-1 header