Here is what I emailed to them:

I recently purchased some of your double platinum spark plugs 103s for my
2000 Ford F150 Lightning. These were replacing the stock motorcraft spark
plugs. I have to say that I am very disapointed in the performance of
these plugs. Acceleration seems "flatter" and at an idle the truck shakes
and feels like it's going to stall. I know you may be thinking that I have
installed them incorrectly and/or did not properly seat my coil packs or
injector plugs. However, I assure you this install was done correctly and I
have talked with other Lightning owners who have report the very same
outcomes. In fact, some of the profesional tunners have told me that they
experienced the same symptoms I am having and that they only ran the plugs
long enough for them to get some new ones and change them out. I know that
supercharged engines are more "touchy" than a normal application but I do
not think you should be recommending these spark plugs for replacements on
the said vehicle.

 

sorry, don't know why this posted twice???

sorry