Hello guys, first post but long time lurker.

I know that there is alot of heatercore discussions but I'm trying to get a straight answer on which one to get. Alot talk about the chevette heatercore. But I'm looking for the bigger one.

I'm looking for the large heatercore to put 2 120mm fans top to bottom. And as far as max preformance, should it be 1 pass or more?

Thanks in advance