Similar to the Sito, but more subdued, and has a little popping when coming off the throttle. I kind of prefer the Sito sound, but it isn't stainless.
Didn't like the shinny stainless at 1st, as the black looks more suited to the G/S, but I'm over that now.
Wanna buy a Sito, gotta sell to pay for the GS front end. Sold a bicycle wheel and a nice R100GS tank almost paid for the fork......almost.