I just replaced front pads and rotors on my 2000 Civic with no issues and when I first hit the brakes I get a good pulsation and it seems to get better after I use the brakes a couple times. I did use the inexpensive parts from advance auto since this is my work car. I am thinking the cheap rotors may have come warped. I should have had them trued up before installing. Any ideas?

Aslo replaced both rear wheel bearings with hub assemblies and I am still getting a thump/knock from right side when turning sharp left and also when braking hard. My drums looked in pretty poor shape, could this be the problem if they are cracked/warped as well?