does anyone know how many iches it is i think it is like 4-5 inches but dont know right of bat i will be measuring it again today at work so i can put a piece up i need to throw stock exhuast on to pass inspection then the 2 1/2 will go back on

 

just install it and then measure to see how much piping is needed. but i wanna say about 6 inches

 

it also makes a difference which crx and which hb you have. some have the cat on the manifold others after the downpipe. and some have a small adapter pipe between the cat and down pipe

 

i though it was somthing like that by eye ball i was guessing but i will be able to cut and fix up tonight

 

well this cat is after header collector and my exhuast rigt now on my hatch has no cat ... and it is a b16a in hatch with JDM type r cams and vt so she will be choked for a couple days till the 2 1/2" goes back on

 

why are you worried about a catback exhaust for inspection. anything after the cat is ok, as long as its not too loud.