Oil pan drain fitting for MKIV (and other) VW Audi engines that are originally normally aspirated. Allows engine to use the stock oil pan's oil drain plug port as an oil return source for the turbo drain point. Works on all oil pans that are 14mm. Fitting assembly accepts a -10 AN oil return line. The part is specially designed for ultra high amounts of oil flow to prevent a backup. Tested on several MKIV vehicles such as R32 32v, VR6, and MKIV GLI/GTI engines with 100% success. Saves the time and energy of having to remove, drill, and replace the factory oil pan.