For those that really want to kill their mpg in a hurry, and cause all kinds of overheating problems off-road... You can now buy the factory SC parts & put them on the NA engine.
I found this as I was looking for some replacement headers:
http://performancenissanparts.com/catalog/product_info.php?cPath=1234_167_235&products_id=5402 For $1900, it claims to be all the parts necessary to supercharge the 3.3L NA engine. Not a bad price. Personally, I think it'd be a waste of $$. But for all the noobs that constantly ask "can I supercharge the v6", the answer, now, is yes.