Exhaust flap hose

[Bimmer-Bob]

So, a few years back I replaced my stock exhaust with a BMW Performance model. The new exhaust didn't have the exhaust flap that the stock unit does, but it did have a post to locate the vacuum hose ( or whatever it is) that activates the flap. A few months ago I swapped to a MagnaFlow cat-back. I had a shop do the install this time, so I didn't think about the vacuum line, but today I was underneath the car and noticed it just dangling. Other than zip-tying it out of the way to look neat, is there anything I should do with this? Does it need to be plugged up for any reason? Thanks.

[Esteban]

My exhaust shop plugged it (don't know if it's necessary) then folded it once and tied it with 2 small zipties.

Edit: so that's what that little post is for on the PE. I guess my exhaust shop didn't know. Me either.

[Ric in RVA]

I would think you want to plug it. Otherwise it must represent a vacuum leak.

So tell us how you like the Magnaflow vs the BMW PE?

[Fade135is]

Originally Posted by Esteban

My exhaust shop plugged it (don't know if it's necessary) then folded it once and tied it with 2 small zipties.

Edit: so that's what that little post is for on the PE. I guess my exhaust shop didn't know. Me either.

I don't see a little post on my PE do you have a picture? My hose was dangling as well.

[Esteban]

Originally Posted by Fade135is

I don't see a little post on my PE do you have a picture? My hose was dangling as well.

Here you go

[BigRussia]

When I did the Golf Tee mod I just put the open end of the hose on one of the downward facing posts/screws from the chassis, fit perfect and it's still on there with my Berk race exhaust.

[Esteban]

Not positive that's what that little post is for, but it is just sitting there... doing nothing.

[ShocknAwe]

Think I used a 3/16 vacuum hose plug on mine. Then tucked it away into the rear bumper paneling.

[Bimmer-Bob]

Originally Posted by Ric in RVA

I would think you want to plug it. Otherwise it must represent a vacuum leak.

So tell us how you like the Magnaflow vs the BMW PE?

The MF exhaust sounds nice and deep, but it's quieter than the BMWPE. That worked for me, though, because I was doing catless headers at the same time and didn't want to be too loud. In a way, though, I miss the sound of the BMWPE - it's just about perfect for this car, I think (at least with the N52 - I haven't heard it on the 135i, although everyone seems to say good things).

Originally Posted by Fade135is

I don't see a little post on my PE do you have a picture? My hose was dangling as well.

I highlighted the post on the picture below. I decided to use a stock photo for clarity, plus my exhaust is packed away. Note this is the 128i version, although it looks like the 135i version has the same post, judging by Esteban's photo above.

[Gangplank]

You could just use a screw the right size. Screw it into the end and zip tie it up out of the way. That's how I did it on my old BMW f800gs motorcycle when I removed the charcoal canister.