I got 8400 on mine and they still look good. Just took them off Saturday and I will go through them.
BTW, to all Viper owners. I have mentioned many times how I have run Heavy Hitters since the sled was new. They still look great and perform great. I bought a 2nd set of clutches from Vikerking last year for spares. They have about 1000 miles on them and are bone stock. For the heck of it I slapped them on and took it for a rip. They over revved to almost 9000 rpm's and it was 38 degrees out. So needless to say if it were colder it may have been worse. Same old problem how many years later......