Plymouth Barracuda headlight bulbs utilized H6024 and H5001 sizes for high beam applications, with H6024 and H5006 sizes for low beam configurations across the model line. The replacement chart covers 1964 through 1974 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 Plymouth Barracuda uses three distinct sealed beam headlight units across its 1964-1974 model range: the H6024, H5001, and H5006. All three are ANSI-standardized units rated at 12V and are sold and used throughout the United States and Canada.
The H6024 is a 7-inch round sealed beam unit. It is the most widely specified headlight across the Barracuda lineup, appearing in both high beam and low beam positions for the 1964-1970 and 1972-1974 model years.
Sealed beam units such as the H6024, H5001, and H5006 house the filament, reflector, and lens within a single fused glass assembly. When the filament fails, the entire unit requires replacement rather than just an internal bulb.
The 1971 Plymouth Barracuda is the only model year in the lineup to use different sealed beam types for high and low beams. The high beam position takes the H5001, a 4-inch square sealed beam unit, while the low beam position takes the H5006, a 5.75-inch round sealed beam unit.
The H5001 and H5006 are not interchangeable with the H6024 or with each other. Each unit has a distinct physical size and shape, which determines its fitment to a specific headlight housing position.
The square profile of the H5001 distinguishes it physically from the round H5006 and H6024 units. Despite this difference in shape, all three types share the same 12V operating voltage and the same ANSI standardization framework.
The H6024 serves dual-beam duty in most Barracuda model years, functioning as both the high beam and low beam unit within a four-headlight system, where separate housings are dedicated to each function.