Originally Posted by
derrek
As far as drilled and slotted rotors vibrating it's probably due to improper break in leaving an uneven layer of brake pad compound on the rotor. For stress cracks 90% of the time you see cracks in the brake compound on the rotor(nothing to worry about).
I seen this when I researched when my brake pedal was doing this
. Ive sent out to get resurfaced.
them back on and re-bedded them again. Still same problem. I even
different new pads. Bought some Stop Tech at the time. By the way they are free to someone who can use them
. Dont particular care for them over the Hawk HPS's. Keep in mine they are for the RS4 calipers. To
this problem once in for all Im going to have to buy dealer rotors. As I
a few different B7 RS4's from a friends repair shop with the owners to confirm the possible
. Their brake pedals had absolutely no vibrations at all. The 1 that I did
that had the very slightest vibration-pulsation had cross drilled-slotted rotors. Maybe thats why from the factory B7 RS4 didnt have slotted or drilled
. Dont know for sure. Its just a very hard pill to swallow to purchase $1000.00 dealer rotors
. Knowing that my rotors are still within wear specs
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