This is a sound comparison, for a 2020 Triumph Rocket 3R, between the stock exhaust and a Competition USA Werkes aftermarket exhaust. The switch-out was really simple and used the stock brackets and bolts. The stock exhaust sensor also fitted perfectly into the new pipes. USA Werkes do not ship to New Zealand so I had to get the unit delivered to my mother-in-law in Houston who then sent it down to me. So, probably the only one in New Zealand.