Originally Posted by ammoman
The amg engine is the same engine except has lower compression pistons. The crank, rods, cam,heads it's all the same. Nothing special just a supercharger and a big price tag to call it amg. In fact the supercharger is a off the shelf eaton M90 supercharger.
The pistons are forged and I believe most of the lower components are too. The rings also have a different oiling system, (little tube that spray oil up into the rings & cylinders).