Kerker developed these 2-into-1 system for improved performance on the 80 CI Evolution as well as 88 and 96 CI Twin Cam motors. The patent-pending bracket mounts the exhaust system to the transmission instead of the frame, allowing the exhaust system to "float" with the engine and transmission assembly. This triple chrome plated or black ceramic coated system comes with a Slash-Cut muffler with internal cone for enhanced appearance, gloss black powder coated mounting bracket and three-piece triple chrome plated heat shields that provide full coverage of headers and collector. The Kerker 2-into-1 exhaust is available for all 1984 thru 1999 Evolution Softails, all 2000-2017 Twin Cam Softails, all 1991 thru 1998 Evolution Dyna's and all 1999 thru 2017 Twin Cam Dyna's.