I know that you already spent some good cash for the car and if you are looking to get turbos get some upgraded ones sport 500s are a good start but what all these guys forgot to mention is that you also have upgrade the injectors... nismo 555's would be fine.... I would have your husband replace the rubber gromets that are in the fuel rail... fuel hose's check for boost leaks... compression and leak down test before buying any of the upgraded stuff.. Here is a write up that will help your husband Its called the 6 P's by ASH