Strange Pipe On A 2.5TDI

Mackers

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Sep 15, 2011
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Sunny Bangor. N.Wales.
hi all, after changing my airfilter and "hoovering" the airbox too, there is what seems to by a pipe in the bottom of the airbox, the kind that use to be used as a heaterpipe off the manifold in cars yrssssssss ago.
any ideas the point in it, as it only goes to a small hole in the base of the airfilter box :S