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Weehe Weehe is offline
Senior Member
Posts: 666
Join Date: Jun 2014
Car: E90 335i
Default 01-25-2019, 08:39 AM

Originally Posted by WaqasRiyami
I see that this coupler is a common problem know.. but how dose it happen ?
The vacuum in the intake when at high boost collapses the coupler. This is normally more prevalent when port injection is involved and the stock intake since it stretches the coupler.
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