Mishimoto 13-14 Dodge Ram 6.7L Cummins Aluminum Coolant Y-PipePlastic has come a long way since it first found its way into engine bays decades ago. But no matter how much stronger or resilient plastic becomes, it's hard to beat solid metal for parts your vehicle relies on every day. Especially if those parts carry vital coolant to and from your radiator, like the Y pipe on your 2013 2014 RAM 2500 3500 6. 7L Cummins. The plastic Y pipe on the 2013 2014 RAM 2500 3500 6. 7L Cummins is needed to connect the dual