National Speed A new breed of automotive performance shop.
they are in Wilmington NC i used to take my old civic there.
talk to Jordan the guy that answers the phones and tell him jason/weltall sent you
they have a huge background in tuning nissans
im also going to link this thread to Jordan
when i was stationed in Jacksonville this was the only shop i would trust to do my tuning (and until they were established i was doing things myself and dealing with alot of shady people.)