Named for designer Neil Tjin from Tjin Edition, the Chevrolet Sonic Tjin Concept was featured at the 2012 Chicago Auto Show. There was an extensive use of carbon fiber treatments and engine performance upgrades, including a Vibrant Performance/Unique Fabrication intercooler kit and MagnaFlow exhaust setup. Additional performance products were custom anodized red Baer big brakes, Falken tires and Forgestar 18-inch wheels with F2 titanium lug nuts.