Rebuild all 4. All 4 have been subjected to the same conditions.
Two piston units are hard to rebuild only in the fact that the pistons are hard top remove at times. With air pressure the non stuck piston comes out and the stuck one stays.
I recommend that you remove the calipers before blowing the pistons out. In fact I recommend that you take them to someone that has the tools, prior experience and place to work. That will make a, without proper equipment nightmare job, seem almost easy. A few tricks are needed to keep the mess and busted knuckles to a minimum.
Before you disconnect the calipers push the brake pedal in an inch or so and block it with a stick. This will stop the fluid from running out of the system.
OEM rotors are the way to go unless aggressive track time is planned.
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"There is grandeur in this view of life...." Darwin.
The mountains are calling and I must go.
“The earth has music for those who listen”
Shakespeare.
You Matter.
(Until you multiply yourself times the speed of light squared. Then you Energy)
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