A-arm Kit, Upper (AAU401) And Lower (AAL401)Improve performance and eliminate A arm deflection on your 1964 1972 A Body with an A arm Kit from BMR Suspension! Factory A arms and bushings can cause deflection, resulting in changes in alignment and reduced performance on the track and street. BMRs A arm Kit (AAK401) includes both Upper (AAU401) and Lower (AAL401) A arms and are designed for street performance, drag racing, and handling applications. When performance is a must, rely on BMR