Quote:
Originally Posted by Razor2010
For sure, my question is, are the internals exactly the same for NA B4 engine as non-NA B4 engine? Is it only external CAT and software for emissions or is there more to it.
I don’t have the answer.
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I’m guessing it is the same since, from my limited knowledge and the reading and digging I did online, the B46 nomenclature in NA is because of SULEV (like the others mentioned) which is basically some software and stuff (no actual engine hardware changes like pistons, crank shaft, connecting rod etc etc. making it the exact same as non-NA B48 cars). Again, this is from my very limited knowledge. I could be wrong but I’m hoping not.