Performance & Fitment

• Application: Front Torsion Bar Set Diameter: 1.39" (Heavy-Duty Upgrade) Length: 55.50" Spring Rate: +16% over OEM

• • Lincoln Navigator: 1999 (Verify length for other 1st-gen years)

  • Ford Expedition 4WD: 1997 through 2002 (Shares the same chassis; verify bar length)

  • Ford F-150 4WD: 1997 through 2003 (Chassis dependent; verify bar length)

  • Note: Features a splined end design that interfaces with an included splined key, allowing for virtually infinite ride height indexing compared to factory hex-style keys.

Premium Construction

• • Material: Solid 4340 aircraft-grade alloy steel, chosen for its extreme fatigue resistance and "torsional memory."

  • Manufacturing: Centerless ground to a precise 1.39" diameter to ensure a perfectly linear spring rate and remove surface micro-imperfections.

  • Heat Treatment: Through-hardened and shot-peened to maintain ride height and prevent the heavy front end of the Navigator from sagging over time.

  • Finish: Industrial-grade powder coating for superior protection against road salt and moisture.

⚠️ Critical Fitment Exceptions

Even if your vehicle falls into the year ranges above, you must ensure it does not fall under these exceptions:

• ❌ 2WD Models: This SKU is designed for 4WD Independent Front Suspension (IFS) geometry. 2WD models typically utilize coil spring front ends.

• ❌ Rear Air Suspension Conflicts: While these bars replace the front springs, ensure your vehicle's ride height sensors are recalibrated if your Navigator is equipped with the factory load-leveling rear air suspension.

• ❌ 54-Inch vs 55.5-Inch Bars: Ford used multiple torsion bar lengths during this era depending on the GVWR and engine (4.6L vs 5.4L). You must measure your existing bar end-to-end to confirm it is 55.50" before ordering.

• ❌ 2003+ Navigator: Will not fit the second-generation Navigator, which transitioned to a completely different front suspension design. 

What’s Included

• (2) Torsion bars
• Splined keys for easy ride height adjustment

Warranty

Backed by a 1-year warranty for peace of mind.