Philip Foglar
///Member
These engines weren't "modified" as in turbo-charged from being a small NA engine to begin with, the engine was designed with the output range, and this is the 320i which as far as I know, has the same basic block design as the more powerful 328i, so the internals and overall design is supposed to be well within the ability to handle the power and stresses. Remember, capacity doesn't automatically translate into engine strength...