S&S Cycle Diamondback 2-1 50 State Exhaust System, Stainless Steel with Black Endcap for 2017-'22 M8 Touring ModelsS&S was building Performance Baggers long before it was called that and our focus has always been on making big power! The Diamondback two into one exhaust is a perfect example of our commitment to true performance. Beginning with a stepped header for maximum flow and a merged collector specifically engineered to prevent exhaust gas reversion, this system wraps up with a 4" full stainless muffler that ends before the rear axle. Diamondback is not for