These are graphics created for two different 300ZX clubs.
Every year, the Z Car Club of America holds a convention in a different location in the US. In 2012, it was held in Phoenix, Arizona. A national online forum called TwinTurbo.net often holds their own small event at the convention, and they like to have t-shirts to give their attending members. In 2012, they asked me to come up with a design. My challenge was to come up with something relevant to the location and to keep it in a style appealing to the culture. I also had to be true to the car, as the members are very picky about accuracy; being one of the members, I know how it is. The TwinTurbo.net logo existed already, but that was the only element I had to work around.
Originally the plan was for the shirts to be red, and I got this far with that idea before the client decided the shirts would be white: