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./ 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, finished in rugged. show-quality chrome and supplied with custom-fit heat shields 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