013-14 RAM 6.7L Cummins 4” Dual Outlet Single Side Crew Cab Short Box Removal of Stock System: Figure 1 1. Apply a penetrating lubricant liberally to all exhaust fasteners, hangers and rubber insulators. 2. Loosen the nut on the clamp located behind the particulate filter. Refer to Figure 1. 3. Remove the tail pipe from the particulate filter, then from the OEM rubber insulator. Remove the stock exhaust from the vehicle. Refer to Figure 2. Figure 2 Installation of MBRP Inc. Performance Exhaust: 1.