If by "shuddr" you mean when you brake that your steering wheel shakes, then you need to get your rotors turned (autozone or checker will do it for about 7 bucks a piece). As for brake pads, I've had great success using NAPA brand brake pads. They are a tad expensive, but they last, and don't warp your rotors that bad.
If you can take a wheel and caliper off, you can change brakes.