Team Z Motorsports Auto Cross A-Arms for 1994-2004 Mustangs. The A-Arms are constructed out of 1â€³ x .095 4130 Chromoly, CNC bent and TIG welded. These A-Arms are constructed with a double gusseted main body, and a heavy-duty sway bar mount. A-Arms are assembled with high quality ball joints, extreme duty urethane bushings, and 4130 chromoly sleeves. A-Arms come in silver hammertone powder-coat finish that will stand up to years of use.