Hello dear community, in recent times the complaints have piled up that the catalysts for retrofitting do not even get at the original quality. Be it from Volvo original or from a third party, the Kats roar and in the end it only annoys one. The solution: to keep the old Kats, because they have a larger wall thickness and thus act as a pre-war for the sound. But what if the old Kat gives up the mind so slowly? The times come, there will also be the Kats needed to be mostly finished. I have the case with my 850 now that the catalyst started to rattle when you knock against it. I already put a good cat on a dump a year ago, which is now installed along with the new Lambda probe. But what do I do with the old one? Throwing away is not possible. I have rather the following thought: is it possible to have the catalysts refitted? So yes, that is possible. But how long does that last? has anyone ever had experience? Especially at the p80? LG, Tim