The exterior hides wind-cheating underbody fairings as well. The 4 Series still boasts an athletic appeal, but with recast quad-headlamps, available LED units, understated air curtain slots and air breathers to create an effortless drive (especially with its new 50/50 weight distribution that creates the lowest center of gravity of all BMW models). It is lengthier, lower, and wider than the 3 Series coupe, and has an added two inches of wheelbase