Does anyone know what the part going into the firewall below the orange sticker is? I replaced the T-stat housing last night and noticed that the part in question was not seated and I couldn't, for the life of me, get it to seat properly. Anyone know what it is and how to get it to seat properly?



Thanks!

 

And yeah, my engine bay is filthy

 

That is the noisemaker... I think. Right? The tee off of the air on the cold side of the intake (after intercooler) to the intake manifold. The pip goes to a diaphragm in the firewall to give more cabin noises for the driver's pleasure.

 

Sweet, nothing I need to worry about then. Thanks!

 

I would not worry about the noise maker, some folks even delete it, a lot of places have kits to make it a clean delete.

Yes, a bit dirty, mine too. A task for this week. I think.

 

I did this mod for removing the pipe all together as documented here:
https://www.northamericanmotoring.co...er-delete.html

I left the firewall vent open. I don't notice any performance difference and a little less noise maybe.