1Y-2Z RH&LH. 1Y- RH&LH. A Shield used to contain The Brake Dust produced by The Brake Pads of a vehicles Disc Brake calipers. This typically is Mounted to The vehicles Wheel Hub. Additionally. it Functions as a Splash Guard to protect a vehicles Disc Brake rotors from Water. Dirt and Debris. A ing plates used on a Drum Brake Braking System. used to contain Brake Shoe Dust. as Well as protect The Brake Drum components from Water.