D4-S Direct Injection question

[thatoneplz]

If this new direct injection system is gonna make the engine so much more efficient, what kind of gains could someone expect if they dropped some upgraded iridum spark plugs, i.e. NGK?

[Cal]

Probably not much unless it came with a pretty high compression. Which I doubt it will.

[modifiedMR]

I'm willing to bet it comes with them. I hope it get COP too.

[modifiedMR]

My 00 celica had iridums and IIRC Lexus with the d4-s systems have them also. I would imagine them being in this car also.