Personally, I bairly failed on a badly tuned engine. Im not sure if Ace lives in an emissions controlled area but he might have problems with OBDII compliance since he has an S14. Most of the people who own SR's live outside of an emissions controlled district. My friend knows someone but thats all i'll say about that, have to contact him in private about it.
You can email this guy (Errin) and see what he did to pass emissions, I think he took them since he lives in Seattle.
http://northwestnissans.com/do....html