The Alcon 363x38 rear rotor specified for Ford F-250/F-350 applications is a left-hand replacement intended to increase brake torque and thermal capacity compared with smaller stock rotors. Larger rotor size helps reduce brake fade under heavy loads, making it suitable as a replacement rotor when upgrading or maintaining rear braking on F-250 and F-350 trucks.
Alcon F250/F350 363X38 Rear Rotor - Left Hand