STAINLESS STEEL Dual Radiator Coolant Y-Pipes This dual radiator coolant y-pipe replaces the plastic coolant y-pipe with a Stainless steel pipe in your  2013-2015 6.7L Dodge Ram Cummins. The factory y-pipes on your dual radiator 6.7’s are constructed from fragile plastic and they are prone to premature failure. This causes large coolant leaks, overheating scenarios and, blown head gaskets for your engine. This preventative swap will keep you from getting stranded while also adding a bit of style to your 6.7 Cummins. all-stainless steel construction and a polished finish and corrosion resistance. this will replace either your upper or your lower connections.