• The "Heavy-Duty" choice for the first-generation Isuzu Trooper (UBS). These solid 25.5mm torsion bars are engineered to replace the lighter factory units, providing a 20–30% increase in spring rate. This extra stiffness is essential for Troopers running oversized tires or heavy front-end armor, as it eliminates "nose-dive" during braking and prevents the suspension from bottoming out on technical trails.

​Performance & Fitment

• • Application: Front Torsion Bar Set
  • Diameter: 25.5mm (Heavy-Duty Upgrade)
  • Length: 39.31"
  • Spring Rate: +20% to +30% over OEM

  • Isuzu Trooper 4WD (UBS): 1986 through 1989

  • Note: Specifically for 4WD models utilizing the 39.31" bar length. Always verify your current bar length before ordering, as Isuzu frequently updated suspension configurations across different global markets.

Premium Construction

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

  • Manufacturing: Centerless ground to a precise 25.5mm diameter to ensure a perfectly linear spring rate and remove surface micro-imperfections that can lead to stress cracks.

  • Heat Treatment: Through-hardened and shot-peened to maintain ride height and prevent the front end from "settling" or sagging over time.

  • Finish: Industrial-grade powder coating for maximum protection against road salt, moisture, and trail debris.

⚠️ 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: These bars are specifically length-tuned for the 4WD Independent Front Suspension (IFS) geometry. They will not fit 2WD Trooper variants.

• ❌ 1990–1991 Models: While still part of the first-generation body style, some 1990–1991 Troopers utilized different bar lengths (such as the 35" or 47" variants). Verify your length is exactly 39.31".

• ❌ Light-Duty Builds: A 25.5mm bar is significantly stiffer than stock. If your Trooper is completely stock (no winch, no steel bumper), the ride quality will be very firm. These are best suited for vehicles with at least 100+ lbs of additional front-end weight. 

What’s Included

• Pair of high-performance torsion bars

Warranty

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