For the driver seeking peak performance, prudent customization and calibration doesn't end under the hood. A carefully selected mid-pipe upgrade enhances both driving power and exhaust sound. MRT Performance has engineered the MaxFlow Series H-Pipe for the 2011-2013 Shelby GT500 Mustang. The MRT GT500 H-Pipe deepens your exhaust note and improves the flow of exhaust gases by 10% over the factory system. It produces an increase in horsepower, torque and fuel economy, while still sounding muscle car tough. The MRT MaxFlow GT500 H-Pipe is made of the highest grade 304 stainless steel, making it light-weight and durable for years to come. This system includes bell-mouth flanges for a leak free seal and premium high-flow catalytic converters that allow your Shelby GT500 to breathe much easier. All MRT H-Pipe exhaust systems feature CNC mandrel-bent tubing to guarantee precise, factory-caliber fit. Installation of the MRT H-Pipe is simple and drill-free. The MRT MaxFlow H-Pipe clamps-on directly in place of the factory mid-pipe exhaust. All MRT exhaust systems are engineered and produced by MRT Performance. Please note that all MRT H-Pipes are custom systems intended for performance use. We make no claim of compliance with local, state or federal emissions standards. Please take the steps to learn about regulations in your area and use on main roads at your own risk.