Strength & reliability in a body lift is a no-brainer - so bolt quality is crucial.
It's a simple fact that the bolts in a body lift kit are the things that hold the cabin onto the chassis, so as you and your passengers sit in the cabin, it's imperative that your vehicle body and chassis do not separate while you are doing your thing on the trail!
Crucial safety information about bolts for body lift kits.
There are a couple of simple rules about using bolts and other fasteners for body lifts. Firstly, regulations state that any modified component is at least as strong as the factory-fitted part. So if the manufacturer specifies a mild steel bolt (say 4.8 grade) and you select a high grade like 8.8, you will be perfectly safe if the nuts you choose have an interference fit to ensure they can't come loose.