Plugs or wires? 20 Years that's a lot of time. For plugs what I have always heard was copper plug was the best for performance. The Iridium last longer, you can try Pulse plugs they are suppose to actually gain power, but they are expensive. Check out pulse plugs on google. Another thing I heard was some horror stories of platinum plugs with a lot of boost, I don't know why. I have a non turbo and I use NGK V power. Some turbo guy will tell you the best. If it is wires I think Nology make supra wires they are suppose to be really good.
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