ok ive posted many times and still havent completly narrowed it down.

my car 96 civic ex w/ 2001 b18c5....

now i just got a dc JDM 4-1 header and a civic apexi WS cat back. Now i know i need 2.5in cat to hook up the header. Now im pretty sure ill need about a 12in cat since the jdm header is longer. So the jdm ITR cat (12inch) would be a perfect fit in my mind but someone else said no, b/c it wont reach the exhaust piping, too short. Im currently runnin the factory type r header and what looks to be factory civic piping and a 17inch cat. The reason i feel i need a 12in cat is b/c the jdm header is about 5inches longer then my current header therfor ill need a 5 inch shorter cat, 17in-5in=12in

so please someone just let me know exaclty what size length cat i will need

 

up

 

ttt

 

someone, anyone!

 

why not get a carsound, catco cat.. and get it welded to fit..

 

i know this, i do, but will someone please just let me know the length i need, i know im not the first to have this setup