MBRP Exhaust Installer Series Cat-Back System, Race Version.4in. Cat-Back Single Side Exit Race Version Aluminized Steel.Features and BenefitsHeavy Duty Aluminized Steel, Fully Sealed Tubing. Bolt-on Installation. Race Version. Signature Styling and Sound. Hardware Included. Built to Perform MBRP's performance exhaust systems are built to perform. Designed to maximize exhaust flow and minimize exhaust temperatures your truck will use less gas, last longer and perform better. Every system we sell has been built to the most exacting standards in the industry. 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. Cat-Back Single Side Exit Race Version ALBolt-On Yes/No: YesCutting Required: Cutting May Be RequiredExit Style: Single Side ExitFlow Increase (%): 85Fuel Type: GasolineHorsepower Increase (HP): 9Major: Performance GasMaterial: Aluminized SteelMinor: SingleMuffler Yes/No: VariableProfile: Race ProfileProp 65 (C, R or CR): CRProp 65 - Short Label: Prop65warning.pdfProp 65 Yes/No: YESTitle: MBRP Exhaust 4in. Cat Back Single ALTorque Increase (FTLB): 20Tubing Diameter: 4 InchType: Cat-BackUPS Able: YesVehicle Segment: Truck