The rods are grate, it the bolts that fail you need to up grade the bolts to the ARP 2000s they are said to be able to handle 1000 hp that was straight from scat that asured me. If you look a the pics in this thread you can see a bolt had broken as well, just dont no what broke first the piston or rod bolt, I was over the rec HP for these blocks could have twisted the block took out a bearing and then the rod (6 or a half dosen ) the combos are endless.