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i have a 2011 Alpina B7 and it started to blow white smoke out of my exhaust so I bought a titanium oil cooler valve for the N63 from N63intake.com used Molly 10w60 and also 2 cans of ceratech from LM as well and it stopped about 90 % of the smoke and 100% of the oil consumption . BTW I also have catless downpipes and a Dinan sage 3 flash tune
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