The factory turbo oil feed line in your GM Duramax supplies oil from the #4 cam journal bearing. This is not only restrictive, if the bearing slips it can cause a blockage of oil flow to your turbo. The Fleece Performance Remote Turbo Oil Feed Line pulls oil directly from the oil rifle on the block ensuring adequate supply and prevents pre-mature bearing failures. This kit not only makes turbo installations easier, it insures proper oil supply to your turbocharger.