As not everyone will have seen in my blog but a few people have requested video's of the Pipewerx 3" down-pipe with decat using OEM cat back exhaust. Had a few of you asking questions, wanting pictures, videos and prices so thought I would post it separately so it can be searched and share the knowledge.
I decided to go with keeping the OEM cat back exhaust after doing some research and comparing after market systems.
For example the Milltek cat back has minimal difference to the OEM cat back exhaust (see picture below).
You can save a large portion of cash too just going with a down-pipe and decat.
Milltek do a downpipe and decat for £405 this doesn't include fitting.
Pipewerx charge £375 for their 3" downpipe with decat, this includes fitting too.
Full system are usually around the £1000 mark, and that doesn't always include fitting.
As you can see the difference between the Milltek cat back and the OEM cat back is minimal.
These other pictures show the down pipe and decat fitted, they do not modify the OEM cat back so it can be returned to stock should you wish.
Keeping the OEM cat back allows you to retain the exhaust valve flap which keeps the exhaust note subtle when town driving, but as soon as you open the throttle all hell breaks loose.
The videos will do the talking but you need to listen on loud speakers or head phones as mobile/laptop speakers don't do it justice as they cant produce the low frequency sounds.
Audi S3 Pipewerx 3" Downpipe Decat run 1 - YouTube
Audi S3 Pipewerx 3" Downpipe Decat run 2 - YouTube
Audi S3 Pipewerx 3" Downpipe Decat - YouTube