I don't know a number on max boost for the rods, but I doubt it's any number we're likely to hit. From the look of my H-Beams I feel confident knowing they will NOT be the first things to go if I start throwing power at them. I wish I could get my PDA to work correctly with my computers so I could get the pics I took online, but right now I can't even show them to you.

BTW, I think they can make both I-beam (what link got) and H-beam (what I got) so you may want to specifiy which you want if/when you call/order.

Oh and, as a custom order mine were like $725 shipped. If you want them it's not much more expensive to just order them on your own, however there is something like a 6week wait from order date to receipt date...which would probably be the case for a group buy too.