lxrd_vtec

So I have a simple question that I'm not finding an answer to anywhere on H-T. Is there anything bad about running an open cat? What I mean by "open cat" is simply having no exhaust piping after the cat. converter. The reason I'm asking is the last hatch I had, I drove open header for two years and had no significant issues, other than reduced emissions and a CEL for no 02 sensor (was a gsr swap). Now I got another Teggy with a stock exhaust, which at first I didn't mind, but I get bored quickly with quiet cars. I'm in the process of starting to accumulate the pieces for my custom exhaust, but I probably won't finish it until close to spring time. In the meantime, will I be okay to run an open cat? Only reason I want open cat vs open header is so that I can retain my 02 sensor and not have the CEL.

My other alternative would be to install this no name catback system that came with my car when I bought it. I honestly don't want to gamble on the fitment/quality of that system, so I'd rather just find a way to increase the sound of my OEM exhaust, again until I complete my custom system. I hope this thread is in the right location, admins feel free to move if it necessary.

Thanks guys

DumpdEJ6

Should be no issues besides noise as far as I know.

DCFIVER

Agreed.

Free Man

JRCivic1

Yeah, I would leave some piping after the cat still connected. This will reduce the rear O2 sensor getting false readings from outside air corruption... AND the things that Free Man has stated above.

lxrd_vtec

Awesome, thanks guys. Think I'll go with Free Man's suggestion, I was partially worried that no piping after the cat might somehow throw off emissions and still throw a CEL code.