Night and day difference between the turbo 6 and na 6. I didn't drive the turbo 4 as it wasn't out yet. I have a 2011 X3 35i. If you are a performance guy or a mod junky...the turbo 6 should be a no brainer. Most of you probably won't, but if you ever feel the need for more power...a simple flash will give you between 50-100whp...depending on what company software you go with (i.e. Dinan, OE Tuning, etc). Just food for thought.
350Z TT - SOLD!
2011 X3 xDrive35i