Stoptech Rotor Question

[fscott]

i also noticed the .99 come up as a stoptech part number while the .87 come up as a Centric part number......wonder if there is a material difference??? (how long do these rotors typically last for you guys?)

I asked Stoptech that a while back. The only difference is that the non-race hardware doesn't include the wave washers to reduce brake rotor rattle.