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spark plugs isnt really the way to go to look for horsepower..
for a stock daily driver you arent going to notice that much of a difference... if any... so the main factor in deciding is really longevity.
Denso iridiums have a smaller center electrode than NGK iridiums... and you can read up on how the smaller center electrode has advantages.. but the disadvantage is that it doesnt last as long as the thicker one... which is NGK.
as far as the price difference... id probably stick to NGKs from now on...
densos are double the price of NGKs... and do they justify... no.
FI setups including nitrous... copper or iridiums are suggested...
Last edited by bl420 : 10-25-07 at 01:56 AM.
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