Piping Inlet Size: 2.5" OD, Major Piping Diameter: 2.5" OD Ratzsdala Exhaust Muffler System delivers the powerful sound with increased power and torque; all welded construction, baffled and chambered for better volume efficiency with unrestricted flow; no packing to blow out or deter. The utilization of highly corrosion resistant stainless-steel construction and cutting-edge CNC precision robotic manufacturing techniques ensure consistently perfect fitment, reliable performance and superior longevity. Product features a premium black-coated finish. While these exhaust systems are designed for use on the listed vehicle, some modifications may be necessary depending on your current exhaust setup. We strongly recommend professional installation, Installation Instruction NOT Included. Easy Install any problem please contact Ratzsdala amazon customer service.