Our 1958-64 Chevy Impala tubular lower control arms are designed for the performance enthusiast! POL’s unique design uses 1.250″ OD DOM tubing and high strength cross tube to triangulate the construction eliminating deflection on your heavy 58-64 Chevy Impala! Improves handling and performance. Professionally built in the USA. Our design provides a position for bump stops and mounts for the optional factory sway bars found on many Impalas. Works with stock cross shafts. A must when running power steering.