[dynoman]

Look at a picture of a brake rotor, they cannot be installed backwards.

https://www.google.com/search?q=brake+rotor

“The cross-hatch in the cylinder walls induces rotation of the rings.” http://blog.wiseco.com/ring-grooves

[PIF]

Look at a picture of a brake rotor, they cannot be installed backwards.
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do not remember what it was about the rotors and the pads exactly its been 46 years please!