Looks like the turbo oil feed line.
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Part: Amazon.com: 55592600 PIPE 3.358 : Automotive
How-To: Replace Turbo Oil Feed Line
How-To: Replace Turbo Oil Feed Line Overview: The turbo oil feed line has a tendency to leak at the engine block seal after about 50,000 miles or 3 years. The replacement feed line on 2011-2013 models includes two o-rings instead of one in addition to an integrated heat shield over the o-rings...
Part: Amazon.com: 55592600 PIPE 3.358 : Automotive