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I'm away to get the front and centre resonators removed, the company doing it can do straight replacement pipes or an x pipe. Has anyone any info on an x pipe. Apparently it's gives better exhaust gas flow but would this affect the engine management in any way. Thanks in advance

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Me and Mike fish did this...keeps OEM back boxes...straight pipes though...can’t comment on x pipe

Yep as Chris said, we both kept them straight. Adding an x-pipe could affect the engine; if that's your intention then I doubt any power gain will be noticable but could be argued by Audi in a warranty claim that you have affected the way the engine works (a risk with modified exhaust anyway but increases the risk I think). There will probably be a slight difference to the sound though.

The centre muffler has an x chamber in it so to have an x pipe would mimic OEM. That said I’ve heard a straight piped version and it does have a different and slightly louder but not in base tone


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When you look through the centre muffler it looks like the 2 pipes go straight through and don't connect.