I don't have brand name powerbands just china made. sucks cause I already over revved a few times and broke'em. I hate China rubber. Even on install they can break and need 3 people to do it. 1 person holding motor at 30 degrees back 1 person stretching the band on and 1 person putting in the motor and exhaust bolts. Makes your engine look cool though and can beat 900 raptors all day!