There are several shops online that sell mandrel bent stainless in several angles, angles with length, X collectors, Y collectors, Braided flex joints, adjustable angles....etc. It's a matter of cutting the material and making clock marks, then taking it to a welder to be welded together, unless you weld yourself. Looks like most "motorcycle" cans are 2 in or 2.25 in inner diametet, so keep that in mind at your exit tips. If you want dual exhaust at the same height as your stock exhaust, the belt side needs a little more work. A high mount or undertail exhaust may also require a riser to be installed on the rear shock for exhaust pipe clearence.