I recently bought an 06 airbox since it has the small velocity stack inside, other than a nismo/K+N filter is there any mods that can benifit this box? My plan is to route a duct from my Varis directly into the box. Anyway, any recomedations are appreciated. Thanks.

 

The varis is good enough, only other thing you could do is put a cold air scoop and a tube leading to a cutout of the bottom of the airbox (before the filter of course)

 

Doing the scoop is my plan. , thanks.