Detroit Speed 12.7:1 Ratio Power Steering BoxDetroit Speed has engineered a brand new, not rebuilt, steering box that provides the performance and feel you would expect from a late model performance car through "Detroit Tuned" rack and pinion valve technology, low friction gear design, and 12. 7: 1 quick ratio gearing. This new power steering box is lighter than the factory steering box. Your original power pitman arm may be used. All new steering gear unit, Not rebuilt DSE Steering Gear Outlet