Audi B6 / B7 Audi S4 4.2 V8 Downpipes - XS-POWER Piggy Pipes

[makmcd]

Hi
Has anybody got any experience of the xs-power down pipes and cats.
I think mine are coming to the end of their useful life.
Will I need to replace the whole exhaust? Will I need a remap?
Resonated or non resonated? ( don't want to find its too loud after)
Sorry if this has been visited before.

[Rich RS6]

I've had a set of the XS Power down pipes with 200 cel cats fitted.. Just to warn you they are a dreadful fit.. They were rubbing and vibrating like crazy when I first had them fitted so ended up taking the car to a custom exhaust place, who ended up having to cut both flexi either side of the cats and totally re make the down pipes.. Ended up costing me another £300 on top of buying them..

I went down this route as both my standard cats had packed in but since having these fitted I'm still getting the emission light on with fault codes showing the cats so haven't really gained anything other than the car does sound very very good now.

[makmcd]

Thanks Rich, not filling me with confidence though, will keep looking.