PowerPort Dual Headpipes make use of Cobra’s strategically located PowerPort cross over to deliver 2-into-1 power with the look of a traditional dual system. Fattens the low-end and mid-range torque curve; perfect for touring and highway use. Includes headpipes, PowerPort cross under section, heat shields and all of the mounting hardware needed. Mufflers not included. Designed to be used with stock O2 sensors.