I think I am running iridiums right now, just because I needed to change them and what the hell. But I keep a pair of the OEM equivalent set aside to install before emissions. You also live in Cali, so keep that in mind. Any engine changes that affect emissions will produce an automatic fail when you get the car smogged. Ignition timing is one of the things they check. I don't know about valve timing, but if they can, I'd bet they do, just to be on the safe side.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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