Designed specifically for HD trike models, these headpipes are a direct bolt on for both Freewheeler and Tri Glide models. Has the S bends built into the pipe, eliminating the need for aftermarket adapters. Because of the Cobra PowerPort crossover, these headpipes perform like a true 2-into-1 pipe with the clean look of a traditional dual system. Fattens the low end and mid-range torque curve; perfect for touring and highway use. Includes oxygen sensor bungs.