Planning on swapping a B16A2 soon into my CX hatch, but with the D16Y7 I think the cat is like on the downpipe? Whereas with the B16 the cat is located under the car is it not?

 

the stock cat is on the front of your motor, its one piece with the manifold.

 

Right, and the manifold that came out of the SiR is obviously not this way.

Meaning what? I run no cat?

 

Bump, has anyone done the swap with a Y7? How did you do your cat?

 

well, i have a ITR swap on my 98 DX (stock Y7) and when i did my swap i had to get a blox test pipe (cause the OEM ITR manifold is 2.5 collector and wouldnt bolt to exhaust) you are going to run into the problem of your B pipe being too long... you wont have anywhere to put a cat lol... unless you get an aftermarket exhaust that is meant to take one....

 

My current "cat-back" is a little too short as it is, it's a stretch to clamp it down.

Can the Y7 cat just be relocated and welded underneath after the B16 downpipe?

I heard this cat doesn't flow as well as a DOHC vtec cat in the high RPM range?

 

i would suggest getting an aftermarket hi-flow cat and letting an exhaust shop cut/weld to fit. you may need to modify yout current cat-back as well. shouldn't be too expensive.

i don't think you will find a bolt-on solution since the header length/configuration is different between b-series and d-series motors.

 

Stock B16A manifold and downpipe + SiR cat + SiR midpipe + stock hatchback muffler = 100% bolt on exhaust.

 

lol true but i figure he will want to keep his current aftermarket cat-back

 

I have, stock B16A2 manifold and downpipe, no SiR cat, no SiR midpipe, and my magnaflow "cat-back" which really just meets my downpipe I seem to remember..

 

again, with your current components you will most likely need a little custom work. get a highflow cat and have it mated up to the b16 header. some companies sell them with an adjustable flange so it can be positioned properly