Howe Steering Quickeners weigh in at only 3.04 lbs and has durable heat-treated internal gears and shafts, they can be used to either speed or slow the steering response in your race car. These units install easily anywhere on the steering shaft with a GM spline U-joint or coupler in 3/4″ x 36-spline. The overall length of the quickener is 8″ and housing diameter is 2 5/8″.