they are cheap...I wouldn't even bother trying to re-use the gaskets. I haven't installed a pyrometer yet but its on my to-do list. I installed one on my old car pre-turbo and then found out that auto-meter probes tend to weaken overtime and break off...thus taking out the turbo. As soon as I heard that I pulled it out and moved it after the turbo. it doesn't give you as accurate of a reading but still not bad, and no chance of it going through your turbo.

I'm sure lots of people have never had them break off but I just didn't want the chance for it to happen.