S63tu / S63 Stage1 - M5, M6, etc. Harness Type B had this on my (F10 2013 550xi) car for 12k miles no issues set multiple records with this tune.
You can see there is a little bit of harness plastic cover eaten up when it fell off in to my pulley but that happened when i installed tune on my car at 800 miles.
Asking $300 new goes for $449
