thanks Colin.

i know Mac has one, but I know Mac pretty well, and i HIGHLY doubt that good-ol-boy has any clue how it works.

i've heard some power figures on 1.8 cars also and was floored. you're right....it's a no brainer. what i don't know is how big of gains the 1.6 cars see over just messing with the AFM. thanks for the data points on the people that have them installed and are happy. i'll probably contact DIY once i get a car, for right now i'm just trying to determine which is the best miata iteration to go with.