International 9370 headlight bulbs utilize H4651 size for high beam and H4656 size for low beam applications. The replacement chart covers vehicle production spanning 1985 to 1987.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International 9370 uses the H4651 for high beam and the H4656 for low beam across the 1985-1987 model years.
Both the H4651 and H4656 are ANSI-standardized sealed beam units recognized in the United States and Canada.
Each unit follows the 4x6-inch rectangular sealed beam format, one of the standard headlight form factors established under the ANSI sealed beam system.
Both bulb types operate on a 12-volt electrical system.
Sealed beam units of this type house the filament, reflector, and lens within a single fused glass assembly, meaning the entire unit requires replacement rather than an individual bulb.
Although the H4651 and H4656 share the same physical 4x6-inch rectangular form factor and voltage rating, they are not interchangeable, as each is specified for a distinct beam function.