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I have used carrillo's in other engines but not in RBs. as far as I beam vs H beam vs A beam vs X beam etc and particularly in the H vs I, I also think that the rod's beam design is probably one of the least important aspects of the rod. material used is probably number 1, then manufacturing process, finishing quality, rod design (not the beam, but the shape and design of big and little ends, the shoulders etc), all that stuff is probably more important than whether it's an H or an I. and again looking at the name brand jap rods which are known to support massive power reliably nearly all the 'premium' options are H beam. I'm currently running tomei rods and yes they are H beam too.

chose a rod based on what power it's know to support, it's quality, it's weight or whatever else is important to you. choosing one purely based on I beam or H beam is not the right way to go about it. there are plenty of each that will support all the HP you want. :)

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