" >7/13 mfg date N55's have a different single turbo; which appears to make more power with oem parts + tunes and so one. wondering if the block, crank, rods, pistions, VANOS, etc is all the same? if so, that would help so that different / bigger turbos can yield 600+gains? At that point what would be better about the N54? VANOS alone should be a differentiation?
Thanks to all you vendors helping push the n55 forward, us owners appreciate it