ok i can get a deal on a 5zigen header P# BHOEX401 which is for the 98 ITR
Iwas wondering if this will fit my EK with a b18c1. even though its part number would be BHOEX301, if it would just need a longer or shorter cat thats fine I run a test pipe but would there be any clearance issues?

 

ttt

 

im sure the itr, si, gsr, and ls headers are all interchangeable, just some are longer than other at the bottom connecting to the cat. I'm not sure if the same goes for b20's and such.