Wow...that was a fast purchase. Another 335 conversion to add to the list.
Between 2007-2008 the N54 used forged internals. For 2009 the N54 used cast. And for 2010+ BMW uses the single-turbo N55 which cannot handle as much power as the N54 can. Same bolt ons and tune from both cars will show a 40WHP difference - the most the N55 can make with bolt ons + tune is ~360WHP. The N54 can do 400WHP, before meth.
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