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Message: <blockquote data-quote="shorty" data-source="post: 1131042" data-attributes="member: 16633">Its possible i have asked this question here before.I just do not remember having an answerso awhile back i changed my plugs on my 95 5.0 and out came a set of autolite AP104the part store shows the plugs going to a 4.6?I know the ones i put in had shorter threads.So what i want to know is: Is there any reason one might put these in? other then just not knowing what there doing.The car ran fine with them. But from what i have read they shouldn't have fit in the 1st placeIm about to do a tune up, and Im curios if i should put these back in the car?</blockquote>