It will do absolutely nothing unless your plugs are old. If you put these in, you could not tell a difference as compared to if you just put a standard plug in there. That's the case with any sparkplug.
When these first came out about 9-10 years ago, I actually ran them on my Maxima. The only difference being that back then it was $14 a plug on sale. There was absolutely no difference. There was no difference in how the car idled, no difference in fuel economy, and no difference on the dyno. When I put a turbo on my old car, I tried these plugs again. They made no difference on the dyno then either. I think copper plugs actually made ~2hp more (but that's just dyno noise).
Spark plugs are one of those things that manufacturers hype up, but no one can ever really tell a difference. It's just that by the time most people change their plugs, it's been quite a few miles and any new plug would make the car somewhat smoother and run better. But if you compared brand new spark plugs side by side (I did this because my car spent a lot of time on the dyno fouling plugs) you would not be able to notice. I ran NGK platinums, the 4 tip Bosch plugs, NGK coppers, and just about every variation of plug out there. Eventually I just stuck with NGK coppers because they were the cheapest and my car went through plugs quickly with the turbo.
Having said that, for $35, it's not really any more than standard NGK platinums so people might as well get them.
does replacing the stock ones with these actually do anything? i'd deff have you pick
them up for me
if possible
