Stock 911SC Exhaust System Stainless???

[porschedude996]

I have my stock exhaust system at a Electro Polisher. He is a bit weary to process because he is not 100% confident that the system stainless.

Heat Exchangers
Cross-Over Pipe
Muffler

I am 99.1% sure it’s stainless. There has never been rust that I can see. I glass beaded several parts and they have been out in the weather, power washed, ect.

Can anyone confirm that they are stainless steel?

[30westrob]

Porsche called the later exhaust systems, corosion resistant steel. I suspect they added NI to improve corosion resistance and they perform much better than the early mild steel systems. They are not stainless steel. Rob

[porschedude996]

So are you thinking High Nickel Steel?

Originally Posted by 30westrob

Porsche called the later exhaust systems, corosion resistant steel. I suspect they added NI to improve corosion resistance and they perform much better than the early mild steel systems. They are not stainless steel. Rob

[911MANN]

I think they called it "Aluminized Steel" back then. I don't really know what that process does, but the result looks like hot-dipped aluminum coating. Similar to galvanizing in a zinc bath, but using aluminum. Hopefully, someone with better technical knowledge will chime in.

[porschedude996]

Thanks guys, I’m thinking Cerakote at this point.