MBRP Exhaust Diesel Down Pipe.4in. Down Pipe T409 Stainless Steel.Features and BenefitsT409 Stainless Steel. Increase Horsepower and Torque. Lowers EGT's. Dyno Proven Your MBRP performance gas exhaust system has undergone countless hours on our in-house Mustang 1100 AWD-SE Chassis Dynamometer, hundreds of miles on road and track and numerous tweaks and modifications to get the most out of your truck. From the vehicle specific muffler design to the fully mandrel bent tubing to minimal bend degree angles, your MBRP performance system gets exhaust out fast. An MBRP performance exhaust system is the starting point to getting the most from cold air intakes, programmers, modules and downloaders.4in. Down Pipe T409Bolt-On Yes/No: YesFuel Type: DieselMajor: DieselMaterial: T-409 Stainless SteelMinor: Down PipeProp 65 (C, R or CR): CRProp 65 - Short Label: Prop65warning.pdfProp 65 Yes/No: YESTitle: MBRP Exhaust 4in. Down Pipe T409Tubing Diameter: 4 InchType: DownpipeUPS Able: YesVehicle Segment: Truck