International 9300 vehicles utilize H4651 bulb size for high beam headlight and H4656 bulb size for low beam headlight applications. The replacement chart covers 1988 to 1997 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International 9300 uses the H4651 bulb for the high beam headlight across all model years from 1988-1997.
The H4651 is an ANSI-standardized 4x6-inch rectangular sealed beam unit rated at 12V. Because the light source is fused within the lens and reflector assembly, the entire unit is replaced rather than an internal bulb.
The low beam headlight position uses the H4656 across the same 1988-1997 model range.
The H4656 shares the same ANSI-standardized 4x6-inch rectangular sealed beam construction and 12V rating as the H4651. It is likewise a full-unit replacement type.
Although the H4651 and H4656 share the same physical form factor and voltage rating, they are specified for separate beam functions and are not interchangeable between the high and low beam positions.
Both bulb types conform to ANSI standards recognized in the United States and Canada, meaning replacements sourced from either market are expected to meet the same specification.