for Gods sake, plugs dont make power you can feel. Stick to the cheap stuff OEM NGK or Bosch and change them 4 times a year.
you will spend the same money and always be so fresh and snappy! I ran on the Densos and I cannot tell you of any real power change over standard plugs. you will feel something for a day or so, but after that... its normalcy. this is true with any fresh plug