Anyone have any experience doing it? I know that the Y pipe needs to be cut from the S4 exhaust to mate to my A4 1.8T downpipe.

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'98 A4 1.8T Quattro Tiptronic

you cando it but your gonna have to do it pretty much axle back, till bolt right on to the 2.8 though, same piping jus different muffler and resonator.

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An audi without quattro is just a VW

why do you want to do that?

Josh

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I assumed that the S4 exhaust is less restrictive, I guess I may be wrong?

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'98 A4 1.8T Quattro Tiptronic

the dia of the tubing is probaly close to the same. The only reason I could see is mabye for the more agressive sounding muffler. You won't see any notable gains with an axel back anyway, neither would you with only a slightly bigger dia tubing cat-back on a NA engine. You'll have to go aftermarket in order to see gains.