Subbie620

Hello subaru people well I am a new member on this form and had a couple of question I recently bought me an 05 subaru wrx sti and I bought the car running good a week later the engine started knocking and so I replaces the short block with a brand new short block I replaced the oil pump oil pump strainer timing belt,tensioner, water pump,and a full gasket set I then drove the car for about 160 miles and just today it started making the same knocking noise I didn't hot rod the car cause I was letting the piston rings and everything break in what do u guys think might have made it spin another bearing???