Hey, I have the muffler off to do some diff work. I bought the car earlier this year. The stock exhaust is scrapped and cracked to ****, I'm pretty sure its leaking. It did not see any gasket when I removed the muffler.
I have a new catback coming next month. My question is, do I need a gasket between the muffler and midpipe? I'd rather not worry too much about the stock exhaust now. The part where they connect is also rusted to ****. I was thinking of cleaning the connections and putting it back. If it is needed, I'll probably have some rtv left over, would that work?

Thanks!

 

You've got several options that are very reasonable in price. First let me say unless you enjoy exhaust fumes in the cabin get the tubes and joints sealed as best you can.
If gaskets are available get them. You can spot old leaks by looking for a whitish powder.
No, RTV will not hold up to exhaust temps, but metallic epoxies and hi-temp tape will go a long way towards this project. You can get them at any auto parts shop.

 

I already do! lol

Its not my daily, would gaskets at autozone work? Though I'm probably fine with putting up with it until I get my new catback.

 

You should be able to match one at autozone. Mine lets me go in the back and check through the folders

 

Grab some orange high-temp exhaust silicone, spread some on one side and assemble the system, then let it cure for a few hours or so…..worked on my DD G35 stainless catback, been sealed for probably 5 months now.
FWIW, I did order gaskets for it, but they didn’t arrive when I went to install it so I just used high temp to get it installed and fitted (needed a lot of custom-work). I intend to install the gaskets after winter