The k24 sits taller than the k20, so the k20 exhaust system will not align perfectly. You have to with modify your existing exhaust or run a k24 race header and you can add a hi flow catalytic converter.K24/k20 swap on rsx.
I’m installing the catalytic converter and it doesn’t seem to fit. The engine is some inches away high. I’ve forced it but now I don’t have clearance. The catalytic hits the top of the shield. What am I doing wrong?