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D2 - Fuel and Exhausts Everything to do with getting fuel into the engine, and fumes back out again

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  #1  
Old 28th August 2024, 09:53 PM
Marty Marty is offline
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Default CAT Rattling

hello, so im new to forum had my S8D2 for about 2wks, what started out like a tiny rattle which I thought was a loose heatshield turns out to be my CATs. The previous owner told me he had issues with the CATs and they were "removed" looking underneath, a frankenstein job has been done, opening up the CATs and rewelding them back up.

Im thinking I have two options:
1 - buy new CATs and get an exhuast fabrication shop to fabricate the exhuast section between the downpipes and the mid-section exhaust
2 - just fabricate a straight through pipe removing the CATs? could be issue with MOT?

Any experience / advice welcome.

thanks Marty
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  #2  
Old 29th August 2024, 11:31 AM
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steamship steamship is offline
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Quote:
Originally Posted by Marty View Post
2 - just fabricate a straight through pipe removing the CATs? could be issue with MOT?
Any changes to the emissions control on a car is an automatic MOT failure. As for the first part of your question, there are members here who have fitted sports CATs to their cars, as the OEM ones are either NLA or very expensive. It might be worth a search to give you some ideas.
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Old 4th December 2024, 01:40 PM
Simon Wallwork Simon Wallwork is offline
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I had this.
Andy at A for Audi in Glasgow solved it in one second by smacking the rattly cat with a hammer.
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