I know this isnt BMW related part, but my friend was trying to figure out what it is used for ? here is a link to the part
Link to Part
I emailed the person selling it, and this is what he wrote back.
Quote:
Blocks off your throttle body so no heat goes in. The idea is that if you block this off the hot exhaust gas will not mix
with cool fresh intake air and will keep the intake manifold and charge
air cooler.
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How can you do that?
Quote:
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It is blocked off below the throttle body. You remove the battery, intake hose, and throttle body elbow to get more room. From there it's hard to miss. In the long run your abel to remove alot of useless crap from the engine bay and free up some room and weight as well. We just though it was about time for a nice thing unit to be made with everything included.
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ok thanks for the help ..