THEY SUCK. J/K ITS PROBLEY THE BEST IMPROVEMENT FOR LOW END AND EASE OF TUNEABILITY FOR THE SHEE. YOULL GAIN LOADS OF LOW END. INSTANT THROTTLE RESPONCE, EASIER ON THE THUMB, EASY TO WORK ON, LOOKS BETTER, BLA BLA BLA. GET ONE YOU WONT REGRET IT. IF YOUR MOTORS STOCK WITH ALL THE BOLT ONS GET THE 33 IF IT HAS PORT WORK GET THE 35. THERE IS NO LOSS UP TOP EIGHTER. BENIFITS MX TRAILS AND THAT TYPE OF RIDING, IF YOU HAVE A FULL OUT DUNE DRAGGER THEN YOULL BE BETTER OFF WITH DUELS. AS FAR AS A DISADVANTAGE IVE YET TO RUN INTO ONE. LATER