[hessel1974]

I think you just got a bad pair of Goetze rings. Actually, if you buy Genuine porsche rings, they are made by Goetze!!

I can recommend Mittelmotor. Great guys who know what they're talking about, but the rings from our host should be the same ones. Maybe a stupid question, but do you have STD pistons? If they are oversized....

I used Goetze and they fitted well.

Good luck!