One of the best ways to control body roll is to incorporate Swaybars into the design of the suspension, effectively providing a torsional spring, linking the right and left sides of the car. This provides the resistance required to reduce body roll. Vehicle engineers used Swaybars, primarily in the front on some vehicles with heavy-duty suspentions and even at the rear – first on high-speed police vehicles and later on performance models. However, because the relatively low loads anticipated due to the limited capabilities of the tires in that era, stock musclecar swaybars fall short when matched with today`s performance radial tires.