Quote:
porkernut said:
zeshark, getting a web post from a fellow Porsche nut won't satisfy the authorities, you will need official Porsche data & here it is for the GT3

1: USA
https://techinfo.porsche.com/techinfo/pdf/en-us/catalogues/997T_USA_KATALOG.pdf
2: UK
https://techinfo.porsche.com/techinfo/pdf/en/catalogues/E_GT3_2_KATALOG.pdf

Scroll down to exhaust section for all the part numbers to compare, there isn't a Swiss link, only German, but I chose Uk as its english.
Hope this helps

The USA link is for the TT. Based on the UK link for the GT3 it looks like the cats might be the same part number but the muffler has a different number in the PET than shown in the picture.