Thanks Steve for the reply. As far as I can tell the car has already had the insides off the cat removed by the last owner by powerflow but didn't get the rest off exhaust done. I had a vw bora with pretty much everything removed just a smaller middle box and there was too much turbo spool noice. Don't want that on the Audi.
Thanks
Michael
Hi there, new to all this. Wanting to get a custom exhaust on my Audi A4 b7 140 tdi. Just wondering if anyone has had one done and which set up did they go for e.g middle box take out, decat. Don't want it to sound S***t. Thanks for reading.