I thought burton fires were intec compatible, but i could be mistaken.
taken from the carvers almanac:
Burton made several Intec compatible boots that are recommended:Burton Wind, 4-buckle + strap. Also, a women's version was made ('99), using a different last, designed for a lower calf position.
Burton Fire, 4-buckle + strap. Stiffer then the Wind, with a slightly taller cuff.
Burton Ice ('00), 3-buckle + strap, designed for women.