- did you use brake grease on back of the pads? If not, that will guarantee squealing. Never leave out that step.

- do your stock brakes use a shim? If so, make sure you use new shims when you change your pads. If you leave them off, they will squeal and will not work 100% efficiently.

- spray some Anti-Squeal on the back of the pads. Obviously you would want to do this before you apply the grease. You could actually use just the spray to try to remedy the squealing; but I recommend using the grease every time so that your brakes work properly. It's messy stuff, but required for a proper brake job.