The Dodge B300 headlight bulb specifications include H6024 and H4651 sizes for high beam operation, along with H4656 for low beam functions in this particular bulb size configuration. The replacement chart covers 1971 through 1980 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H6024 is the dominant bulb type across the Dodge B300 headlight specifications, serving as the sole fitment for both high beam and low beam positions from 1971-1978, and continuing as the two-headlamp fitment in 1979 and 1980.
The H6024 is a 7-inch round sealed beam unit operating at 12V and conforming to ANSI standards recognized in both the United States and Canada. As a sealed beam design, the entire unit is replaced rather than an internal filament or bulb element.
The H4651 and H4656 are both 4x6-inch rectangular sealed beam units operating at 12V under the same ANSI standard framework. Like the H6024, each requires full unit replacement rather than a component-level swap.
In four-headlamp configurations on the Dodge B300 for 1979-1980, the high beam and low beam positions use different bulb types. The H4651 serves the high beam position while the H4656 serves the low beam position, meaning the two rectangular units are not interchangeable between positions despite sharing the same physical format.
In two-headlamp configurations for 1979-1980, the H6024 round sealed beam unit handles both high and low beam functions within a single unit, which is a standard characteristic of dual-function sealed beams of that format.
The shift from a uniform single-bulb fitment to a configuration-dependent fitment occurs at the 1979 model year, where headlamp count determines which bulb types apply across both beam positions.