um, now i'm confused, arent 1J's map, and not MAF? why would you up grade to a 2J map, i thought all of those were Mass air? were the JDm mk4 MAP, or MAF? um, toyota sucks as far as making up its mind as to which intake type it will use, it seems it varies form US to japan, and from year to year. MAF or MAP MAKE UP YOUR DAMN MIND ALREADY!!