I've found that the GS-R and the ITR cat are pretty much the same, at least the diameter and bolt pattern matches up.
The Bosal should be here Monday and I'm going to just go ahead and drop the exhaust from the exhaust manifold back to the cat because I need to replace the notorious dipstick tube. It's located behind the manifold and I found out the hard way that you can't just put a 6mm hex socket on an extention and hammer away to get it to stay tight without it bending.
A new one (pic) and some Hondabond should do the trick as being able to properly check the oil level on a 90k mile B18 is sort of important.
