I'm at 60k on my stock brake system. I think I have narrowed my choice to ATE powerdiscs in front and stock rotors in back with Redbox all around. Probably going to buy it all from ECS. Before I order, can someone tell me what kind of brake sensor connectors I have? I have a 2002 GLS. Also, are there not sensors on the back pads? Lastly, I'm worried about the redboxes squealing and I have seen that proper bedding, anti-squeal stuff, and shims will do the trick. The bedding and anti-squeal stuff I know about but the shims are new to me. Can someone explain how the shims work and how to install them?