2x2 design allows fitment of stock heat shields Cross over allows rider to run dual exhaust on both sides 1-3/4" headpipes Utilizes an advanced inner collector for maximum performance 18 mm and 12 mm O2 ports Made to fit with stock slip on mufflers and Bassani Xhaust slip-on mufflers Made in the U.S.A.. HEADPIPES 2X2 09-16FL CHR