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Ess 535 recirculating valve...
Hey guys thinking of going boost. But i like to hear the sound. I was told you can plug the hose to make the car sound like a whistling or what not sound. I was wondering if anyone has done this. Let me know please and videos would be nice !
-Trevor
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Current: 2013 E92 M3 AW DCT
Past: 2011 E90 M3 AW DCT, 2011 E92 M3 MR 6MT, 2008 E92 M3 AW 6MT
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