Do these fenders require fasteners or hardware to install?

Hardware is not included with the fender set. You'll need fasteners appropriate for your existing factory mounting points. Source stainless steel hardware in the fastener size that matches your vehicle's original holes to avoid corrosion over time.

What prep work do I need before painting?

Sand the FRP surface with 220-grit or finer to promote paint adhesion and remove any mold release residue. Wipe clean, then apply your primer and top coat of choice. FRP accepts standard automotive primers and paints without additional sealing steps.

Will these affect tire clearance or suspension geometry?

The 22B flare design is period-correct and assumes stock or lightly modified suspension. If your setup runs significant camber, wider wheels, or lowering springs, verify fitment against your wheel and tire combination before final installation. The flare lip is fixed and does not flex.