i just searched at autozone, sure enough the 97 year model has a round chamber where the heated coils sit and a 02 has the square chamber

edit: changed to the square style in 99. anyone want a 99+ MAF? lol

looks like the 97-98 TB are less restrictive, being they dont have that huge molding hanging down in the TB you get ported out with the "high flow" TBs