Contour Enthusiasts Group Archives Forums Modifications Duratec Performance spark plugs

I'd say go for the autolites or motorcrafts as well, no one here has any problems with them as far as i know. that being said, i seem to remember a guy in hawaii i think it was who tried the denso's and claimed good power gains, no proven numbers just seat of the pants feel, but he said they also burned up pretty quick on him. he went through those pretty quick. as a side note, stay away from the bosch plus 4's too, they don't work to well in our engines. if you do a search on sparkplugs and set the time frame for a year back, you should find more than you want to read about this issue as it's been discussed heavily. hth and good luck.