Interesting for sure.I had a link for a supplier, I think it must be on my home computer though.Someone will post up for ya.As for the material type, I'm not sure. I wonder if tool steel would be robust enough, stainless maybe? I know back in my Toyota diesel days there was a stainless replacement available for thier IDI engine.
I know you guys don't have a vw shop around every corner like we do, but why not buy them from VW?I get everything from them.. rusted bolt? for a buck, I'll have them from VW, no worries.
I remember hearing they were Inconel as well. What do you need them for, 1.6, 1.9?
Here is the only place that I have found that still has pre-chambers, the only problem is that they are in Germany. http://www.moto-szlif.pl/wirowe_de.htm Give it a try. Herman
http://vwdiesel.net/phpBB/viewtopic.php?t=6987Got that from a canadian wholesale parts supplier distibuter. Big one up there. Tried to get some a while back, they said they had them but would not sell across border.