DTS DTS Cadillac with RPO Code J55 (Heavy Duty Brakes) with RPO Code JL9 (Power 4 Wheel ABS Disc Brakes) Rear Brake Pad & Rotor Kit. TRQ – 5 total parts – 2x Rear Brake Calipers, 1x Rear Ceramic Brake Pad Set, 2x Rear Premium G-Coated Brake Rotors.