Not at all. I still love them to bits. Only noisy when you blip or tap off when slowing down. I was contemplating going to a single can but decided against it. Some on eBay sold one for under �80 used. Now that was a bargain

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2010 XT660Z Blue, Exan can, UFO high front fender, SW Motech baseplate, heated grips, 12v point, Kevs Fuel & O2 mod, DNA Stage 2 Filter and cover, Givi tall screen, Mefo mfe 99s, Kevs throttle mod, TT high seat and 'compass'