High Performance Tubular Turbo Racing Design Made of High Quality T-304 Polished Stainless Steel Alloy Material for Strength and Durability Tubular Design to Ensure Equivalent Exhaust Flow Rate from each Cylinder Computerized Mandrel-Bended to Maximize Air Flow Smoothness TIG Welded CNC Machined Flange for Resistance against Cracking and Wearing Increase Engine Exhaust Output and Efficiency 38mm/ 35mm External Wastegate Port and Flange Included Standard K03/K04 Configuration Outlet 100% Brand New Professional Installer is Highly Recommended (No Instruction Included)XS-Power