if you snap a rod from Forced Induction in your VQ 3.5 engine do you need to just buy new rods or rebuild the whole engine

 

most likely replace the whole engine. if there is enough energy in the internals to snap a rod, it will likely go through a sidewall, maybe into another cylinder and maybe throw the piston up into the head. if you get lucky you will just be replacing the bottom end of the engine, but chances are you will be replacing most, if not all, of it...