Sparkplug wires doesn't increase your performance by much.Unless the sparkplug wires you currently have need replacing (already bad).As a sparkplugs copper is the best since the transfer electricity better, the bad thing about copper is these sparkplugs not last very long. As for Bosch platinum, I don't think they are good,especially for Japanese car.I prefer using NGK copper (OEM) or Denso Iridium (if you want to spend more money).