K&N Air Filters Added to Stock Air Boxes??

Originally Posted by Jordo!

First part isn't quite right, at least based on about a dozen or so Nismo vs comparably modded/tuned non-nismo Z's I've seen dynos for. The fueling and spark profile will not adapt to match the Nismo's without tuning.

Also, I thought the Nismo does have a slightly higher rev limit as well -- I could be wrong on that one.

I also remain convinced that the Nismo has slightly different VVEL tuning as well -- although that is yet to be confirmed (hello, GTM?) -- after viewing these dynos I've been accumulating from various folks (all dynojet, BTW).

However, I agree 100% that picking up any Nismo exhaust new is not needed -- get one used for modest gains and good sound without any unexpected rasp or fitment issues.