50??Piping Diameter: 3.00 with Welded Flex PipeIncrease Engine Output and EfficiencyGain 10 - 15 HPsDirect Bolt-On Installation, Requires NO Modification; Easy to InstallO2 Sensor Insertion, Bolt(s) and Metal Gasket(s) Included 100% Brand NewProfessional Installer is Highly Recommended (No Instruction Included)Package Includes:1 X Set of Downpipe Kit, Necessary Hardware, such as Gaskets and Bolts