Thread: Cost of walnut shel intake port/valve cleaning??
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      11-24-2017, 12:33 AM   #3
tranquility
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Drives: 2011 Z4 sDrive 35i
Join Date: Aug 2007
Location: Montréal

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What's everyone's view on walnut blasting? I've never had it done but am way up there in mileage. I don't think I have any real noticeable effects. Just wondering if it should be done and when and description of any improvement. TIA.
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