Milltek - what to do with exhaust flap line

[coullstar]

Was having a look under the car in preperation for fitting the Milltek exhaust and never even realised the S4 has the exhaust flap. Is there a procedure to follow with the flap vacum system plugging when fitting aftermarket exhausts?

[1781cc]

yeah, there is a guide on here somewhere (search), I did it but dont think it does much, flaps get stuck so you will need a long screwdriver, WD40 and a hammer!

I ended up getting a full non-res miltek with full decatted racing downpipes instead )

[coullstar]

Im away to fit a Milltek so need to disconnect / reroute the vacum lines, I did a search but nothing came up.

Im not bothered about anything to do with it on the standard system.

[marv]

As you're going aftermarket, it doesn't really matter what you do with it I don't think. I've seen some people have plugged the pipe with an appropriately sized screw, and cable tie it out of the way somewhere.

[1781cc]

sorry, I slightly misread what you were asking. the fitters should sort out what to do with them, I know MRC did with mine

[coullstar]

Im fitting it myself.

[1781cc]

I'll get my coat

[Pie]

Graeme,
Not sure if the S4 has an air box flap as well like the RS4;

If not and the vacuum pipes only run to the exhaust and nothing else, you can either leave it or shove a bolt down it to plug it and prevent the system from sucking up dust and crap from the road.

If the vacuum system is shared with another air-controlled system on the car, you will need to plug so the other system still operates.

I'd be tempted to plug regardless.

Do a search on the B7 RS4 forum for more info.