i think bubs give more power, have a great idle but lose that great sound as rpm's rise. ss have a lil less performance but i think they sound better. or you could go with thunderbike and have the best of both worlds

Frank

(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves NOW-2010 silver and black tbird