I say all of the above are true. If you are looking for a good horsepower increase...save your money and buy a bolt-on or something. Wires are one of those things that add so little of a power increase, that really paying top dollar for one the most advertised names is not worth it unless you are trying to squeeze and extra ounce of horsepower after doing so many other things! However, having good (not the most expensive) wires is worth helping your car run better (better throttle responce).
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