This rack and pinion is designed for A-arm front steer medium sized vehicles. It has a 1 1/4" rack gear with a 1 1/4" pinion and has a 1 1/2 to 1 ratio. It is fully polished and requires 1/2" heim thru hole. This rack is fully enclosed and machined from 6061 T6 aluminum. This rack, just like all of our other racks, is proudly made here in Santa Fe Springs, CA. (Distance between tie rod heims is 11 inch spread on the bar) This rack has a 3/4" 48-Spline pinion gear. 64-1025