The F-20 Tigershark’s defining upgrade was the replacement of the F-5E’s twin J85 engines with a single, more powerful General Electric F404 turbofan. This change delivered roughly a sixty percent increase in thrust, resulting in a lighter airframe with significantly improved speed, climb rate, and overall agility. Despite these advantages, the program was ultimately canceled when the United States relaxed export restrictions on advanced fighters such as the F-16, eliminating the F-20’s niche in the international market.