In 1967, the GTX made its debut as a distinguished trim level on the Belvedere, marking the beginning of its journey as a premium muscle car under the Plymouth brand. This powerful and refined vehicle quickly captured the attention of car enthusiasts, offering a blend of high-performance capabilities and upscale features. However, as the years went by, the GTX eventually became integrated into the iconic Road Runner lineup, further solidifying its place in automotive history. By 1972, the GTX had left an indelible mark as a symbol of Plymouth's commitment to producing exceptional muscle cars.