Hey,
the e55 from the year 2000 has a 265kw (350hp) engine in it, but the newer ones have the same engine with supercharger and they have 500hp.
My question is, are the engine internals the same? Can I add the same SC to my N/A e55 with all other parts (ecu,etc) or I allso need new pistons,rods to make the bottom as strong as the newer one?
Any help needed

Thanks,

Allar

As I see the comp. ratio is 10.5:1 N/A and 9.0:1 (supercharged)
but what about pistons,rods? Maybe is the headgasket just thicker?