Lifted trucks loose caster which wears tires and leads to wandering at high speeds. These arms improve droop travel, drivability and tire wear as well as adjusting tire position in your wheel well with SPC's adjustable front upper control arms. Featuring an upgraded greaseable ball joint and rubber isolated xAxis™ bushings, this arm is designed to correct alignment angles while maintaining factory ride quality. These  arms have +1° of caster built into them and using the patented ball joint design, the arm will get you ±2.0° of caster and ±2.0° of camber. SPC's fully forged steel design provides the strength and durability needed for the most demanding environments. These remove and replace arms are sold in pairs.