Do I need new wheel bolts or studs to install this?

The assembly uses factory bolt holes and stud configuration — your existing wheel bolts work as-is. Inspect studs for damage during removal; replace any that are bent or stripped.

What torque spec should I use when installing?

Refer to your vehicle's service manual for the correct axle nut torque specification. Over-tightening can bind the bearing; under-tightening creates play and noise.

Can I reuse the dust cap or tone ring from the old hub?

Verify fitment on the new assembly before discarding old components. Some tone rings (ABS sensor rings) are press-fit and may need to transfer from the old hub depending on year and model configuration.