Arctic Cat T660 Series high beam and low beam headlight bulbs both use 894 size bulbs for optimal illumination. The replacement chart covers 2004 through 2008 vehicle 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 894 bulb is the sole bulb type specified across all headlight positions in the Arctic Cat T660 Series for the 2004-2008 model years.
The 894 is a single-filament halogen bulb operating at 12 volts and 37.5 watts, built to ANSI standards recognized in both the United States and Canada.
A single-filament design means the bulb contains one tungsten filament, which is why separate bulbs are required to serve the high beam and low beam functions rather than one dual-filament unit handling both.
The 894 uses a PGJ13 base, a pin-style connector format that physically determines which replacement bulbs are compatible with the socket.
Because the high beam and low beam positions in the Arctic Cat T660 Series share the same 894 specification, both positions accept the same replacement bulb.
At 37.5 watts, the 894 falls in the lower wattage range for halogen headlight bulbs, which is consistent with the power constraints typical of powersport and recreational vehicle electrical systems.