Ironman4x4 Torsion bars are thicker than standard torsion bars and will make your 4x4 safer while providing more comfortable cornering and braking efficiency. All Ironman4x4 torsion bars have upset forged ends and are pre-set to minimize sag. Additional 4x4 accessories such as a bull bar, winches, and dual battery kit place enormous stress on standard torsion bars. Being uprated (thicker spring steel) Ironman torsion bars enhance ride comfort by controlling suspension travel whether carrying additional accessories or a full load of passengers.