Winfried,

Give Krumscheid a call. He is a most helpful guy. He just hates to reply e-mails.

For the 58cc engine he has prepared flanges and 25mm headers, as well as a tuned pipe.
Any KS front inlet-front outlet kanister for a 60cc engine will do.

I ordered some (by mail) and got no response yet. He probably waits for me to call to finish off the details.