Wanna buy mine? I have an OBD-II compliant hi-flo cat (it's got the rear bung for the O2 sensor) that I just have sitting around. I bought it from Hybrid Garage but they were so slow on shipping, I wound up putting in a test pipe instead. They promised that it would fit with a JDM header and 2.5" exhaust on an ITR. I say this because I hadn't had a chance to test fit it.

I'll send it to you for $90 shipped