Detroit Speed

Detroit Speed 12.7:1 Ratio Power Steering Box

1968-86 Chevrolet/GMC C Series Trucks/Suburban 1987-91 Chevrolet/GMC R Series Trucks/Suburban

Part # 090216DS

Detroit Speed 12.7:1 Ratio Power Steering Box

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Detroit 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
  • Improved steering feel due to low-friction gear design
  • “Detroit Tuned” precision rack and pinion valve technology
  • Late model performance car feel
  • Quick ratio 12.7:1
  • Original power pitman arm may be used
  • Lighter than stock steering box
  • A new 3/4 x 30 spline rag joint (3-1/4” OD) is available through Detroit Speed
  • New O-ring power steering hoses are needed
  • DSE Steering Gear Outlet Fittings not included
Brand Detroit Speed
Emission Code6
Input Shaft3/4 in. x 30-Spline
Number of Turns Lock to Lock3
Pressure FittingM18 x 1.5 O-Ring
Product TypeSteering Box
Return FittingM16 x 1.5 O-Ring
Weight (LBS)25.1
California Proposition 65 RequiredYes
Part Number090216DS
To install this steering box on a 1967 C Series truck, frame modifications in the steering box area are required. A new 3/4 x 30 spline rag joint is available through Detroit Speed (P/N: 090205DS). Detroit Speed hose kit (P/N: 091202DS) can be used with this steering box. Detroit Speed steering shaft kits are available to replace the factory rag joint and coupler: P/N: 092541DS - 1979-87 GM C10 Truck P/N: 092542DS - 1973-78 GM C10 Truck P/N: 092543DS - 1968-72 GM C10 Truck

*Free Shipping & Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.