Quote:
Originally Posted by andrey_gta
What is this sorcery?
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It's piping that goes between the intake and the firewall to pipe intake noise into the cabin. The mod is removing some of the sound deadening foam from the pipe.
The BMW Performance Intake for our car retrofits a similar piece, as seen in the top right here:
http://realoem.com/bmw/showparts.do?...89&hg=13&fg=95
Or in this picture, item on the right replaced with left:
