Do I need any hardware to install these, or does it come with mounting bolts?

The assembly itself comes as one unit. Verify your factory bolt count and condition before installation—you may reuse existing hardware if it's in good shape, or source replacements from your dealer parts diagram.

Will these work if I switch between 2WD and 4WD, or are they locked to one drivetrain?

These are built specifically for 4WD models. If your truck is 2WD, you'll need a different part number designed for two-wheel-drive geometry.

What's the return window if the bearing doesn't fit or match up?

Contact our support team with photos of the part number on your old hub and the new one—we can confirm compatibility before you install and arrange a swap if needed.