Team Z Motorsports Standard Non-Adjustable A-Arms for 1979-1993 Mustangs. The A-Arms are constructed of 1â€³ x .095 4130 Chromoly Steel and TIG welded. A-Arms are assembled with high quality ball joints, and Energy Suspension Poly bushings for durability. A-Arms come in silver hammertone powder coat finish that will stand up to years of use. Proudly made, assembled, and quality checked in Detroit, Michigan.