A-Arm Rack and Pinion- This rack is the same dimensions as the 64-1000 Rack and Pinion. Can be used on front steer or rear steer, A-arm or trailing arm cars. Rack gear is made of 4130 Chromoly. Housing is hard anodized. 1/2" Heims are spaced 2.320" apart and this rack uses a 3/4" 48-spline pinion gear. This rack is identical to the 64-1002 except for the steering ratio. Steering Ratio: 1-1 (Recommended for Short Course Only) 64-1011