S8 exhaust

[Felly]

I know some of you guys have wired the flaps in the exhaust open. Is this a difficult job or relative easy? Ud like to do it to mine but I'm having trouble finding out how to do it. Any help would be gratefully received.
Steve

[Norretal]

It's easy mate, if I can do it anyone can

Have a look underneath at the back boxes and you'll see the vacuum units that operate the flaps. Shine a torch down the inner pipes on both sides and you'll see the flaps. Wedge them open and wire the linkages in that position with a piece of strong wire, job done. Probably easier with an extra pair of hands but once you take a look and understand how they're set up it'll make sense.

A8 Doc posted some pics in the relevant D3 section back in 2011 so take a look at them if it'll help.

[Felly]

Thank you very much, everyone on this forum are very helpful. Did it make of a difference? And sorry for the questions, would I be right on saying when in sport mode the flaps open up at all revs?

[Conquistador]

The flaps open when more exhaust gas is forced through. They are not actuated with the throttle.

It's easy to keep them open. I cable tied mine open quite easily.

[kele]

I used a large jubilee clip on mine. So far so good...

I would say at full throttle there is no difference (because they would have anyway be in the open position). However, on idle or light throttle there is a notable difference. A more pronounced bass sound.

Maybe also a perceived quicker pick up too...

[mattsimis]

Out of interest does the S8 exhaust fit onto a standard A8 4.2?