Features 2>1 Equal length stepped head pipes 1-3/4">1-7/8">2", oxygen sensor ports, and plugs, 12mm O2 ports for factory sensors and 18mm for wide band. 2-1/2"x16-1/2" baffle inside a straight performance muffler housing with 4" polished billed end cap. Head pipes are industrial chrome and come with full coverage chrome or ceramic black heat shields. Uses a unique extended inner collector maximizing performance. Designed specifically to address the needs of tuned motors built for high horsepower applications. We recommend 110 cubic inch engines or larger. Check out the video to hear it! http://www.bassani.com/advertising/press_releaseRR2video.php 18001282 EXHST 2-1 MEGA 95-11FL CH BASSANI XHAUST FLH-767 $859.95 18001283 EXHST 2-1 MEGA 95-11FL BK BASSANI XHAUST FLH-767B $879.95 18001284 EXHST 2-1 B1 95-11FL CH BASSANI XHAUST FLH-777 $859.95 18001285 EXHST 2-1 B1 95-11FL BK BASSANI XHAUST FLH-777B $879.95 Recently Chris Rivas of Rivas V-Twin shop installed a B1 on a Bagger with a 110 Motor with CRVT 1800cc Kit, SE 58mm Throttle Body, Rivas Ported 1.9x1.6 Heads, S&S Cams, and Bassani B1 Exhaust. He ran it on his Dynojet and received impressive results with this set up. 133 RWHP, 125lbs of Rear Wheel Torque