What is this?

[mrdave]

Poking around my engine bay this weekend and noticed this metal tube hiding behind the airbox that I can't figure out. Anyone know what it is? I can't really tell where it's coming from either.

[SFJ_RS6]

Hmm... I just checked and my car does not have a mystery metal tube at that location. On my car, it's just the rubber blank that fills the hole in the firewall. Perhaps a previous owner put some aftermarket system on your car, and didn't remove all the plumbing. Where does the end terminate in the engine compartment?

[mrdave]

The end in the picture is just open and hanging there, not attached to anything. I can't see where the other end originates. I guess I'll have to do some more investigating if this isn't a stock part. Thanks!

[4everRS]

Defiantly something done aftermarket. That rubber price is normally blank. My guess is that it goes to the vacuum running under the airbox. Could be for a boost gauge or meth injection kit.

[SFJ_RS6]

If the engine compartment end goes into the vacuum, make sure it's properly plugged, so you don't have any vacuum leak there.

[Justin9212]

I bet someone had a wire or vacuum line run through it at some point, and it has since been removed but not completely.

[Bormaley]

Sorry, what you mean?

[ben916]

Sorry, what you mean?

are you spamming?

[hahnmgh63]

Yea, looks like another Spammer