STOP YOUR LEAK. The 2013-2015 Cummins with dual radiators are built with plastic y-pipes that crack and end up leaking. The S&B aluminum one piece design fixes this issue and prevents leaking in the future. A COMPLETE KIT. The S&B kit comes with stainless steel t-bolt clamps. Designed to look nice and last a lifetime. EASY INSTALL. Watch our step by step video to see just how easy it is to install.