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The best plug wires are the stock ones. You will not get anymore power out of $200 set of plug wires then a set of stockers. I have seen numerous Toyota's at the breakers with 200xxx+ and 95% of them had stock wires. Plugs is another fallacy when it comes to making power. The only ones that I would see that has a chance making any real extra hp is the Pulsar spark plugs and they have a capacitor in them that actually amplifies the spark and makes them fire multiple times during the firing sequence (like a MSD, multiple spark distributor). The basic Platinum plug pizazz is a joke, you have to have more coil to actually get a better spark and that has nothing to do with the plug. Clean plugs are a must but not $8 platinum plus 4 or blah blah blah.
Good oil is something you should be running anyway but running Royal Purple is not going to net anything special. To me these are modification you would do once you have spent money on basically everything else and you have extra money to wring the last few hp out of the car. These mods may net you 5hp if you are really lucky and if what you are replacing is that crappy. However if these parts are not up to snuff they can also hurt your power.
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