I am very aware of how old this post is, but since it was never specified exactly what kind of plastic BMW uses I thought I would share this good read....
From the link below.....
Quote:
Mahle and BMW Specify Air Duct of DuPont™ Hytrel® Polyester Elastomer to Reduce Weight and Cost
Stiff yet elastic DuPont™ Hytrel® HTR4275 is being used in a new two-component air duct from system supplier Mahle of Stuttgart, Germany, that connects the intercooler and throttle body of BMW’s three liter, six cylinder twin-turbo engine.
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Materials that Withstand Today’s Hotter Running Engine Systems
stimpee did you ever find you a doner motor?
