There are a few problems with factory stamped control arms that aftermarket options will improve. The geometry of the control arms is almost always corrected; this is done to help improve handling. Stamped suspension components also tend to be heavier and a bit weaker than the aftermarket options offered by suppliers.
Tubular: There is much debate on whether or not the weight savings of tubular control arms is worth the investment. Though in many cases the weights will be similar, there is no denying that tubular control arms are much more rigid than the factory stamped options.
This added rigidity is there to reduce deflection that may occur making the wheels more stable; this added with corrected caster on the front end makes them well worth the time and effort.
Adjustable: On third-generation Challengers, adjustable control arms are available. The adjustments allow for one to tinker with the camber of the wheels.
By being able to fine tune the control arms, one is not limited to the settings implored by aftermarket suppliers. This means that the owner can set the vehicle to the sweet spot that suits them best.