Quote:
Originally Posted by brandon519
It will make a difference if your current wires are old or defective. That being said, it will not be a noticeable performance difference, but maybe a smoother idle or easier startup. So basically don't waste your money if your motor is otherwise stock and running fine already. I got them when I was diagnosing an ignition problem, because my car was going to be turboed, and because I like how they look lol.
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^this
engine bay aesthetics is going to be the only major gain
not worth the money
i have a regular set that has one mismatched wire and a blue ngk set switching them back and forth i have noticed absolutely no differences what so ever