Will I need to modify my fog light cutouts to install this bumper?

This bumper is designed with factory-style fog hole locations. If your C5 already has fog lights installed, verify the hole sizes match your current setup before final assembly. If you're adding new fog lights, reference your light's flange diameter to confirm clearance during fitment.

Does the lower valance mount flush without gaps?

Factory mounting points ensure the lower valance sits flush when bolted to the frame. Any gaps typically result from uneven bolt torque or missing shims on the chassis side — use a straight edge across the bumper surface during installation to dial in alignment.

What prep work should I do before painting?

Sand the entire surface with appropriate grit to promote paint adhesion, then clean thoroughly to remove all dust. Apply a quality epoxy or polyester primer before your final color coat. raw FRP accepts most modern automotive finishes without additional sealing steps.