Yeah, as I recall...all 2000's are plastic. I know CarDoc has been "messing" with MAF's for quite a while(not for the stuttering problem), there seems to be a split among the experimenters...some good performance and some worse & some total failures. I believe the stuttering will only be "totally" fixed with a Ford engineered recalibrated chip and I'm sure we all know when that will be! Still, I await the outcome of whatever brave soul might be out there to try this on a stock setup.