Car is a 96 GSR. I am looking to change up some things and I am looking into the JDM ITR exhaust manifold and I already have a Spoon N1 axle back in my possession. Here is where it gets a little complicated.

1st - How large is the Spoon B-pipe diameter? I already used the search function and got no help... when I search Spoon exhaust I get like 500 posts about sales or what the N1 sounds like...... if you wanna know what it sounds like check expletiveing youtube.

2nd - I plan on buying the B-pipe and am trying to find a cat to use with this whole setup, JDM ITR cat keeps getting mentioned and I have heard that it is 2.5". I have read that it is either 17.5" or 17.75" I am not sure what stock GSR length is so I am trying to get all my ducks in a row with this system.

So this is what it looks like JDM ITR 4-1 JDM ITR cat Spoon B-pipe and Spoon N1..... maybe this seems like a dumb question. but when I had my Mugen Twin Loop I had to have a different flange put on the B-pipe to mate up to the cat and I don't wanna deal with any leaks and have to have additional work done by the local muffler hack specialist.

 

No one knows.... this is hard to believe.

 

Christmas morning bump..... Come on people how about anyone who has the JDM ITR header chime in and if anyone has the Spoon unit please chime in as well.

 

just bring it to a muffler shop