Left.4WD. Left.REG & QUAD CAB. Right.4WD. Right.REG & QUAD CAB. 14" Wheels. 15" Wheels. A bushing, typically made of rubber, used to provide a surface for the Disc Brake Caliper guide pin to move freely. A sleeve used to provide a surface for the Disc Brake Caliper guide pin to move freely. Disc Brake Caliper Pin Seal. Incl.Guide Pin. Incl.Sleeve. Kit. Sleeve. Guide Pin Sleeve. Slide Pin Bushing. Slide Pin Seal. Included with: Caliper.