The airbag was patented in the early 1950s, yet not one classic muscle car ever left the factory with one. General Motors tried offering it in the 1970s, Mercedes-Benz finally made it work on the 1981 S-Class, and dual front airbags did not become mandatory in the United States until 1998. Read on to find out why an idea that existed before the GTO took nearly three decades to reach a dashboard, and what that means for anyone driving a classic today.