Sorry for posting this because I know it has probably been posted before, but I just tried a search and couldn't find anything. Anyway, I drive a 2000 Civic DX and was looking to finally complete my exhaust, but nobody makes a header for my car. Instead of the header then, I was going to get a test pipe from racingpipes.com. Question is: do I get a test pipe with or without the oxygen bung? Might be a stupid question to most people on here, but I admit I really don't know a lot about test pipes. I'm guessing the bung is used for the O2 sensor, assuming my car has one where the pipe would be installed. Am I correct? Also, it looks like the test pipe for the Civics is a bolt on one. Do these pipes usually bolt up, or would I have to weld mounts for them? Thanks in advance for any help.