for anyone out there who runs an HMF does anybody run anything besides a Utility series, like the ecosystem or the penland. i dont know how much quieter they are but i want to put exhaust on my rubi but i dont want it to be really loud.
Are you refering to the ECO?Just put this exact kit on mine today - its not loud at all - its louder than stock but also sounds way better deeper sound. Also you don't get a jet kit with it just he main jet and no instructions on the jet either. power gains also are good.