Ya stock booster and MC.

We had the car's ass jacked up and spun the rear wheels, hit the brake and the rear wheels slowly stopped, instead of suddenly stopping due to being in the air.
We did the same with the front ones and they stop like they should.

And I should mention that the E-brake will stop the back, if that helps anyone. Its been my savior a couple of times now, it's living up to its name.