Honda Motorcycle VT1100T Shadow ACE Tour Headlight Bulb Size
Honda Motorcycle VT1100T Shadow ACE Tour headlight bulbs use 9003 size for both high and low beam functions. The replacement chart covers 1998 to 2001 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 9003 is an ANSI-standard halogen bulb used in the United States and Canada, operating at 12 volts with a dual-filament design rated at 60 watts on high beam and 55 watts on low beam.
The dual-filament construction of the 9003 allows a single bulb to serve both high and low beam functions, which is reflected in the Honda VT1100T Shadow ACE Tour headlight system across all listed model years.
The 9003 uses a P43t base, a bayonet-style mount with a 43mm collar, which is a standardized fitting shared with the internationally designated H4 bulb type.
Both the high beam and low beam headlight positions on the VT1100T Shadow ACE Tour call for the same 9003 bulb across the 1998-2001 model years.
The H4 and 9003 bulb types share the same physical base and filament configuration, though the 9003 designation reflects the ANSI classification while H4 reflects the ECE classification used in other markets.
Because the 9003 is a dual-filament bulb, the high beam and low beam outputs originate from two separate filaments within the same glass envelope, with the higher-wattage filament assigned to the high beam function.