thats a rather large range, which is why adj is a better option. a fixed arm cant properly set caster for both a 2" lift and a 4.5" lift.16.25" (center-to-center) Lengthened over stock in order to properly correct caster on 2-4.5" lifts so the website says but it doesn’t mention rather I have to change anything else.
So you haven’t had any issues with them being made from aluminum?if you can spare a bit more cash, the savvy double adj arms are very nice. johnny joint on each end and you dont have to remove one end of the arm to adjust them. I've got ~6 years on my set and they still ride like they were fresh off the shelf
only 1, they are still bare and arent covered in rust.So you haven’t had any issues with them being made from aluminum?