something strange on exhaust?

[ANDREW HUGHES]

hello all
finding a rattle on the exhaust of my 2.0 1999 z3

so had a quick look and there is something on the rear tailpipe of which I have two.
but the right-hand one has some sort of valve attached and a tube or wire coming from it to somewhere
when I look down the right-hand side of the exhaust tailpipe I see there is a circular paddle of metal in the pipe.
The fitting on the tailpipe is loose looks like some sort of valve and I can move it freely and in doing so it moves the paddle in the exhaust tailpipe.
I am assuming it controls the exhaust output somehow but it is all very loose and rattles I don't think it should be loose?
so any advice would be great I do not know when and how the exhaust was fitted this is how I bought the car in Jan this year.

 

[Ianmc]

It's part of the ejector seat vacuum mechanism, just be careful which buttons you push in the cockpit.
Sorry, I'm sure a sensible answer will be along shortly.

 

[Braz86]

That could be the valve that opens at 2k revs to give the sweet harmonics. Just a guess as I also don't have a scooby!

 

[t-tony]

It was designed to minimise noise in urban areas. It open at higher revs and allows more gas out. If it is loose (like mine was) you can jam a lever into the exhaust and bend it to stop the rattle.

Tony.

 

[roadvoyager1]

It is a valve that opens at higher revs to give a more sporty exhaust sound. I think it opens at around 3,000 rpm and it should not rattle.

 

[ANDREW HUGHES]

Anyone know how it is held in place or wether it is actually required ?
There seems no brackets or fixings ?
If I replace the exhaust would it go anyway?

 

[ANDREW HUGHES]