Left and right arm set for lifted vehicles with caster correction. Raising a vehicle washes off caster and causes a loss of straight line stability, vague steering requiring constant correction at higher speeds and can cause caster shimmy. The SuperPro Caster Correction Arm Kit solves the issues with built in caster correction Offering nearly 4 of correction for a 50mm (2") lift and 2.5 for a 75mm (3") lift