Thread: DIY Leaky Turbo Lines 550i (n63)
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      10-14-2015, 08:08 PM   #11
sweetazzj186
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Drives: 2011 550 xi
Join Date: Jan 2015
Location: New Jeresy

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The hose size should be 1/2 inside diameter. I just tried 5/16 and 3/8 and they were both too small. I ordered 1/2 now.
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