I've had them on both superhawks I've owned. They only make them one way-they don't offer a "street" or "race" baffle on the round black powdercoated cans like they do w/ the oval cans. They're straight through and I remember one can had a spiral baffle and the other was just parallel to the length of the can (?) Anyway on my first superhawk I went from the original stock cans, which I was used to, to the Jardines and I thought they'd blow the tools off the walls in the garage they seemed so loud when I revved the bike up. But I experimented w/ several systems when I later bought another superhawk. I had D&D's before the Jardines and the Jardines were NOTICEABLY quieter-more tuned/muffled and less of that sharp LOUD Harley drag pipe sound from the D&D's. I don't think the Jardines give as deep a bass sound as say a two bros does. But it comes down to personal preference. But for the price compared to other new systems they are worth it and look real nice.