The Ford F-150 Boss 5.4 was a limited production aftermarket variant of the 11th Gen F-Series that debuted in 2005. The Boss 5.4, which had previous appeared as part of the 10th Gen F-Series, was built by LA West, featured a range of custom options, including a body kit, a Roush-sourced supercharger, and other performance upgrades. The 5.4L V8 engine had an output of 460hp, which was sent to the rear wheels through an automatic transmission. Just 100 examples of the 11th Gen Boss 5.4 were built before production ended in 2006.