The factory sway bars on your 1999 to 2004 Mustang are kind of sad, small creatures that do a decent job getting you to and from work and around the 'burbs, but when it comes time to take a swing at your local autocross meet or hit the road course, they don't exactly keep your Pony on the straight and level. That's where our selection of high-performance sway bars come in. These aftermarket Mustang sway bars are thicker and stronger than stock and help keep your Mustang flat through those corners with maximum traction.