Carrier assy bushing. Front. Left.3.2 LITER. Right.3.2 LITER. A Bushing, typically made of rubber, used to provide a surface for the disc brake Caliper guide pin to move freely. Disc Brake Caliper Bushing. gasket. mount. Balance weight. Disc Brake Guide Pin. Disc Brake Slide Pin. Included with: Carrier assembly.