Which iridium plugs last longer, NGK or Denso?

[nmatthis]

I've got 32k miles on my Denso IK22 plugs. I have a 99 Solara V6 5spd with supercharger at 4 psi. No other engine mods. I'm curious if the NGK iridium plugs last any longer than the Densos. The Densos are supposed to last only 30k, so I'm overdue. But considering I have an SC, it's difficult to impossible for me to replace the plugs and expensive to get a dealer to do it. Any opinions on the NGKs?

[dan99solara]

NGK's are a lot better than bosch or denso. NGK are the stock plugs on almost all cars in japan. But yea the iridium NGK's are top of the line and I would deffinently get them. I had them in my acura legend. I would suggest you get a dealer to put the plugs in if you have the money because getting around that supercharger is going to be a b!tch

[hari-bhari]

I thought the plugs were supposed to last for a lifetime (I had the Denso IK20s, for n/a cars). But I must say that I was very pleased with them in my 5s-fe. Don't know much about NKG, but I know that Denso does make a quality product, so you can't go wrong.