Not sure what this is

[johnn]

Hi. Does anyway know what this is? Looks like some soft of restrictor or secondary air box?

Car's a 2004 E46 318i.

Thanks.

[Mallard]

hi john

whats the chassis number

ill try and find the peice for you :)

[johnn]

Not trying to find replacement, just wondering what that thing is and what it does.

[Mallard]

im not offering a replacement..

im simply trying to help.

good luck

[BMW_Hatchback]

LOL @ this thread



Oh, and I don't know what that is, sorry

[Maverix]

It's the interkit for the turbonator. I've got 2 of those now :D

[bullmand]

I bet it's a resonating chamber to reduce intake noise. The M44 engine has one, but it looks a little different than that.

[trickiekid]

Bullman, you beat me to it. Yeah, that should be a resonator. Like Bullmand said, it reduces intake noise by interfering with the intake pulses.

[johnn]

Bullmand & Trickiekid, thank you! Since it's a resonator, should be ok to remove it. It's flapping around in engine bay, so either I need to tie it down or remove it (might need to buy new intake tube though). Guys, thanks again.

[trickiekid]

You should be able to remove it, assuming that it has no sensors attached to the part. Legally, i am not sure of, but I wouldn't think that it serves any purpose for smog. I have seen lots of people remove similar boxes and cover the holes with black duct tape. Let us know what you decide to do.

[johnn]

Aplogies for newbie question. Would removal of resonator decrease low end / take off power? Was adviced to keep resonator there.