Hey Yortivo,
Welcome to the board. I'll try to help where I can.
Unfortunately, on the MY00 you have the first of the 4 cat systems. I believe the US Fed mandates a warrenty of 50K miles for emissions equipement and my understanding is this is the limit of the Porsche warranty as well. However, it can't hurt to ask your dealer. Also, while you are at it, I'm curious why only 2 of the 4 cats have gone bad. Did the dealership mention weather it was the primary metallic or secondary ceramic cats? I only ask because for 3K in parts, you have a lot of aftermarket options.
Dansk and FVD make good quality 100cell metallic cats, cat bypass systems and headers that maybe worth the investment to you. I know that if you contact a sales rep through either
www.************************************************************ or
www.fvd.us and tell them your situation, you can likely get a discount from the published prices. To take advantage of this to the fullest, you will likely need to reprogram your DME so you won't get a low efficieny light.
Let me know where your specific issue is and I'll try to help steer you in a reliable direction.
Good luck,
--ts
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