Bassani Power Curve True Dual Crossover Head Pipes For Harley Softail 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: A True Dual crossover system that performs as good as it looks Bassani's Power Curve is a direct bolt-on replacement for stock head pipes Designed to achieve proper port angle and tuned rear pipe length, the Bassani Power Curve offers improved low-end torque, appearance and an unmistakable exhaust note Each system is made of 16-gauge steel True Dual Crossover require a set of Bassani's revolutionary slip-on mufflers choose from 3 with slant tips Zz28574, 3 with slash down tips Zz44531, or 4 Megaphone Zz28576 mufflers