Nothing yet, it has the stock motor, running real strong. I do have a vq35 motor also a Sentra motor, debating on what I should do with it. I have a friend mike that own Z-repair Company and he is a great tech for these cars, he has one that is all costumed out, I’m still new to the old skool 240z, still learning more about the car and still learning on what’s available for the car, if you have any ideas please feel free to let me know. Here is the car my buddy mike has. One thing I can say about it. BAD ***!