Bassani Power Curve True Dual Crossover Head Pipes For Harley Touring The classic true dual style may never go out of style as they are still favored over many riders till this day versus a 2-into-1-into-2 style header pipe. Bassani has done one hell of a job with their design as the headers step from 1-3/4 to 1-7/8 that create a distinctive stereo sound. Features: 1-3/4 equal length headers Includes full coverage heat shields 12mm O2 ports for factory sensors with plugs 18mm wide band sensor with plugs Can be used with most aftermarket mufflers Rear cylinder features new power curve bend