Before going to our local race track I decided to change my rear brakes.
My old calipers were completely stuck, brake discs very rusty and poor brake pads.
The new (From MR2 turbo) were much better all around and there was also braided brake lines.
Here you can see some photos:
Now braking effectiveness is much better, but I still need to change front calipers, because they are still old and hardly working.