Competition Engineering's Professional Wheel-E-Bars are designed to withstand the abuse of drag racing. Each bar features upper spring adjusters made from 7075-T6 aluminum to allow for ease in preload adjustment. The lower struts are made from high strength 6061-T6 aluminum, enabling them to handle the forces applied to them without fatiguing. Each kit includes all the required fasteners as wll as quick release pins to allow access to the rear end housing for jacking.