o2 Housing to Mid Pipe Gasket



This is replacement o2 housing to midpipe gasket.












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I bought this when upgrading to the 2.5" ZZP mid pipe on my 2013 Sonic RS. I was pleasantly surprised when looking at the package that it had a GM Genuine Parts sticker. You can see the little notches in the holes in the picture and those kind of get stuck on the downpipe studs' threads, but once you get it on, it stays in place. It's a good idea to replace the gasket when you separate the flanges anyway.