Mikesspeed

Hi very first post on this website so hopefully some you suby savvy people can help me out. It came to us first with a bad engine noise wich sounded like a rod bearing. The owners explained that he was bombing down the highway with the peddle to the mat and all of a sudden started hearing a knocking noise. Low and behold, #2 & #3 rod bearings were badly scored as was the crank. Everything was spec'ed out; crank bearings were spec'ed and ground, new rod bearings from subaru aslo spec'ed before install, erverything was cleaned and double checked and new gaskets. I should also mention that he has cat-back exaust, performance chip, iridium plugs/wires. About two weeks later 1500 kms, he comes back with again bad engine noise wich of course sounds like a rod bearing and again #2 & #3 crank bearing are done. Now before he recieved his car, oil pressure was checked a found to be ok. There are no signs of detonation on the pistons, no heat discoloration on the crank journals or rods. What gives!!! Ive been reading alot lately and have seen this issue resolved with a short block, but to go and buy a short block without knowing for sure the reason for this mess is kinda stupid. Any help is apreciated.