MagnaFlow Tru-X Pipe for Mustangs MagnaFlow's Mustang Catalytic Converter is designed to do two jobs: Reduce Emissions and Improve Flow. The emission reducing task is taken care of by two high-efficiency ceramic catalysts that use heat and a precious metal coating to burn off harmful elements. Flow improvements are accomplished by utilizing fast-flowing mandrel-bent tubing and incorporating MagnaFlow's Tru-X crossover pipe that replaces the inefficient factory H-Pipe. MagnaFlow makes both a 50-state-legal Mustang Converter, as well as an off-road Tru-X crossover pipe without converters.