This is a great exhaust for your sport, OR stock cylinder. Its relatively quiet also. We dynoed these exhausts, and we saw an 80% hp gain vs the stock exhaust. Lightweight, high quality and proven gains. Fits most Horizontal Minarelli; Zuma '02-'11, Horizontal JOG, Vino 2t, Taiwan clone bikes etc. Will fit Genuine 2t 50 ONLY IF YOU CHANGE TO A MINARELLI CYLINDER!!!!!!