Eisenmann Resonated Center Pipe Set - F10 M5Eisenmann F10 M5 Resonated Center Pipe Set Eisenmann's engineers are responsible for designing the OEM systems seen on Porsche and AMG cars and use this experience to design the best performance exhaust systems in the world. Eisenmann's performance exhausts are built by hand from start to finish to create old world craftsmanship simply not available from other exhaust manufacturers. NOTE: THIS IS THE RESONATED VERSION; Non Resonated Pictured Link to