PartsW 4 Pc Suspension Kit for Ford E-150 E-250 E-350 E-450 Econolite Super Duty Front Upper & Lower Ball Joints Dust boot is re-installed and permanently attached to reduce contamination, and increase durability and service life Undergo impact, wear, and fatigue testing to help ensure quality and durability Advanced corrosion protection against the harshest conditions / Precision-made performance and additional strength Designed with premium quality materials for exceptional performance, reliability and peace of mind PartsWs / Premium Quality, Service & Experience. Click on PartsW and look at our feedback