Hotchkis also recommends Classic Performance Products’ (CPP) 500 Series steering box as part of a full TVS package, especially if the original box is exhibiting slop or leaking like the EcoNova’s. No one wants a leaker out on the track or autocross course. The CPP 500 box is a completely new part and has a ratio of 14:1, making it quick enough for autocross and suitably stable at high speeds. Make sure to pick up a new �-inch 30-spline rag joint coupler as well since it’ll also be well worn. We’ll reuse the original pitman arm, though.