4x4 Explorer sport Torsion Bars

[Elwoods67]

I have read a few threads with conflicting information regarding the torsion bars for my application. I have torsion keys and shackles for a lift on my 1998 4x4 Sport. It’s been great but it’s time to replace the front torsion bars. I would like to replace it with the most heavy duty ones available for my application. I have read that “level 1” bars have the highest spring rating.
Has anyone ever replaced/upgraded their front torsion bars? If so what was the part number?

 

[Mbrooks420]

There’s only torsion bars in the front. I wouldn’t expect the Ranger bars to be the stiffest, and they Explorers had a heavier motor option.

There’s nothing really heavier duty about them, they are just slightly stiffer.

 

[swshawaii]

Anything here? Use VIN whenever possible for fitment and accuracy. GL
#1 Torsion bar Part #'s. 99% sure