For some reason it's harder to get all the air out of the system with these calipers. Bleed the system LF, RF, LR, RR, then do multiple ABS stops. Give it a day or two, then do a 30 psi bleed LF, RF, LR, RR. If you bleed correctly, they are rock solid. If you aren't going to use Castrol Red Rubber grease on the pistons/seals, don't even bother using these calipers. No one wants to hear you complain about a soft pedal when you were given the answer in the first paragraph or the first post in the thread.