It can be authorized in some countries and It's not at all legal in some other nations around the world, so You need to be certain it is legal to change the stock exhaust. They're just some of the means I’ve personally toyed with to generate my stock Harley exhaust https://harleydavidsonexhaustpipe01222.blogunok.com/23402191/helping-the-others-realize-the-advantages-of-exhaust-harley-davidson-sportster-1200