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Originally Posted by cali2008
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just wanted to reply to how new plugs (of any type) will usually make a noticeable difference... its the same for almost any new part that has anything to do with the way an engine runs or the car drives, you are replacing a old worn out part, so the new part makes a big difference bringing the engine back to how it should run. so new plugs replacing worn out ones will make you think they are better than what they replaced when in reality they are just getting back to stock specs. same for the guy that used the high $$ kryptonite plugs above, he would have likely noticed 99% of the improvements from OEM copper plugs too because what was replaced was so worn out.
same goes for tires for example, everyone raves about how good their brand of tire is, but the vast majority of people changing to new tires had very worn out tires that road like crap, & many of them are crappy oem tires to begin with or a cheap replacement a previous owner used... so any decent new tire will seem like its the best tire in the world!
just keep it in perspective, when you replace an old/bad/worn out part, even a oem new part will make a huge improvement. the v6 engine will see very little benefit using high dollar plugs over the oem plugs, aside from maybe life span & even then oem coppers can go to 75k+ & look & function fine. if toyota felt the v6 needed special plugs they would have used them like they did in the v8 with irridiums.