Steering idler arm for Buick/ Cadillac/ Chevrolet--- manufactured to meet the same standards of performance and longevity as the OE. Extensive dimensional and material analysis to ensure the very best compatibility between the OE and aftermarket part. d to withstand temperatures below -40C and over 120C, helping to ensure they perform even under the harshest conditions. Parts exposed to 720 hours of salt spray for optimum protection against corrosion. Additional cataphoretic coating for greater protection against corrosion and enhanced aesthetics.