I just bought a 1992 Mitsubishi 3000gt Vr- 4?

Everything is pretty much stock except it has an air intake kit, and the twin turbo set up is a sequential set up now (pretty sure stock would be parallel set up not sure though). Just curious and want to know what else I can do to the car to increase performance. I am pretty much open to any suggestions and any help is much appreciated.
 
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