I bought these for my 2003 RSX to replace the stock spark plugs after almost 90,000 miles. I was surprised to see that the ones I pulled out were still in pretty good condition. Don't skimp on spark plugs. Iridium candles are a little more expensive, but given the fact that they last many times longer than copper or even platinum, they are worth the price. I've noticed very little improvement in power and fuel efficiency, but the real difference is in the feel of the engine. When idling or atโฆ