Hand crafted in the Netherlands from stainless steel tubing in precision build moulds these custom exhaust pipes are more a work of art than "just another exhaust". They come in raw stainless steel with welds as you see them on race bikes. Add your own baffles or mufflers, or use them as they come for the track or show. The 2-into-2 and 2-into-1-into 2 systems have a 1 3/4" (44.5mm) muffler connection, 2-into-1 have a 2" (50.8mm) muffler connection. Custom fitment, so may interfere with stock footrests, brake pedal or air cleaner.