Do these spats require drilling or special fasteners to mount?

Installation method depends on your vehicle's factory mounting points and your preferred attachment style. Verify your rear bumper's bolt and clip configuration before ordering, and reference your service manual for the correct fastener locations and torque specs.

What prep work is needed before painting these diffusers?

Sand and prep the surface thoroughly to ensure your paint adheres properly and cures with a factory-quality finish. Use appropriate sandpaper grits for FRP, wipe away all dust, and follow your paint manufacturer's prep guidelines for best results.

Will these spats fit over my current rear bumper, or do I need to remove it first?

Measure your rear bumper's profile and check clearance to the spat edges before final assembly. Some installations allow fitment over the bumper; others require removal for a cleaner mounting surface. Take time to test-fit both pieces to confirm your preferred approach.