Because of the oil crisis in 1979, Ford decided to replace the 4.9L V-8 with a 4.2L V-8 in hopes of achieving better fuel economy for the fox body. The new engine was the only V-8 engine that was offered in 1980 and 81. It produced only 120 hp, the lowest ever for a Mustang V-8. This change meant that the performance choice for 'Stang buyers was the 2.3 L turbocharged four cylinder engine - it produced 132 horsepower, but had reliability issues due to inadequate lubrication. It was listed as an option for the fox body 'Stang through 1981.
If you're looking for parts for your 1981 Mustang, check out the categories below for easy searching. We have an extensive selection of performance parts, mods, and accessories for the 1981 Mustang enthusiast.