Before I remove my stock cat... Gaskets.
 

I plan on test fitting my MazSport midpipe tomorrow in order to fabricate copper gaskets for it. Before I remove my cat to check, I would like to know if I can reuse the stock gaskets. It will be at least a few days before I can source the materials to make new gaskets for my MazSport pipe, so I would like to avoid having downtime.

edit: Well, damn. Accidentally posted in the wrong section, but don't judge!

I reused my stock gaskets when I put in my agency power midpipe. I assume it'll be the same for you.

where are you getting the copper sheets?

Yes.

Yes you can. Just try not to bend the gaskets when taking them off and reinstalling them. But I don't see a problem. I've been doing it for years. Take pics and let us know what you think of the pipe.