Is there a good brand of hypereutectic, stock replacement pistons for this engine? From the looks of things, it seems like the choice is either forged pistons or cheap, no-name, Chinese stock replacement pistons. The usual brands like Speed-Pro, Silvolite, and Mahle don’t seem to make anything for this engine. Also, I don’t want to go forged because I don’t want to run loose clearances and deal with having to deal with the resulting shorter lifetime. This engine will NEVER see a turbo, and doesn’t need the strength. What is a good piston to run?

 

I think NPR (Nippon Piston Ring) Makes pistons for 3RZ.
I have used them with good success in 22R engines and some American engine rebuilds.

 

I actually looked at Nippon, as I have considered their pistons for a Honda project. The only problem is that I can’t find any oversized pistons. It looks like all they sell is standard. Maybe I’m misreading things. But if this is true, it is the epitome of stupid. I mean, if an engine is worn enough that you are tearing it down to rebuild it with new pistons, you are going to rebore it, right?