Nothing Yet, I have just been keeping up the regular services.
This car is awsome. I have never driven anything like it in the world. I mean I have driven Camaros, Firebirds, and all sorts of ricers. But this one takes the cake. It is quick and responsive. It breakes really well and sticks in the corners, However the only bad thing is the rear end in these cars are extreamly light. When you mash the gas the rear end has a tendency to take off before the front. Resulting in you facing the oposite way you were going. But never the less this is a great car.
A couple of sand bags in the trunk over the axle helps make the back tires stick better. but does add over all weight