Control Arms: only the Steeda G-Trac Stage 2 and Stage 3 systems come with rear control arms at all, but they're often a must-have item for 3V Mustangs that are pushing out higher power levels than stock. Both upper and lower rear control arms help keep your rear axle locked firmly in place to prevent dangerous wheel hop and to provide better traction so that your Pony maximizes the power it puts to the ground.
Panhard Rods: Our very own Stage 2 and Stage 3 packages come with a BMR Adjustable Panhard rod, but most kits do without. While not necessary for most applications that drop your Pony's ride height by 1" to 1-1/2", a panhard rod comes in handy for larger drops from more aggressive systems that can cause your Mustang's rear axle to become displaced by the stock panhard rod and brace. An adjustable panhard rod will let you dial back in a perfect suspension geometry for your application.
Strut Tower Braces: Some of our suspension packages do come with strut tower braces, but not all of them clear big superchargers or intake manifolds so it's usually best to grab your own if you're planning on grabbing big upgrades later on. Many of the strut tower braces that are included in packages are often some of the more expensive options out there, and you can save a buck or two by finding your own.
Bump Steer Kits: both Steeda Autosports and Whiteline offer bumpsteer kits for the 2005 to 2009 Mustang GTs that get rid of the excess bump steer that occurs when you lower your Pony. Bump steer is when your suspension causes steering inputs during articulation which can make your Mustang tougher to control and can lead to excess wear on your tires and suspension components. When you lower your Mustang's ride height with a set of lower springs, your factory suspension geometry gets thrown off to a certain degree which causes bump steer. These bump steer kits help correct your Mustang's suspension geometry and eliminate bump steer to get you back excellent handling.
Caster/Camber Plates: while not explicitly necessary, especially with some coilover kits that can adjust caster and camber on-board, caster/camber plates from BBK Performance or Maximum Motorsports are a good option for standard suspension packages on vehicles that see multiple street and track applications. For instance, you can give your Mustang a 0° camber for street driving and then adjust to an aggressive -1.5° camber for track or autocross uses to get better traction through the corners.