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      09-21-2012, 03:23 PM   #225
Tiago@VRSF
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Drives: E92 335i, F30 328i, F82 M4, i8
Join Date: Dec 2007
Location: Boston, MA

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The ceramic pipes are only coated on the outside. Anyone who claims they coat the inside only coat whatever is visible since the coatings are not dipped, but sprayed. It's impossible to spray the full length of the interior.