Will this bumper work with my factory fog light cutouts?

The M4 bumper has openings sized for the same fog light configuration as your original bumper. Before installation, verify your existing fog light holes align with the new bumper openings — the design maintains OEM proportions, so compatibility is straightforward.

Do I need to sand and prep the bumper before painting?

Yes. Sand the surface with appropriate grit to create a clean base, then wipe down with a tack cloth before applying your chosen color coat. This ensures proper paint adhesion and a professional finish.

Are there any lower valance or lower trim compatibility concerns with the M4 bumper?

The M4 bumper has a more aggressive lower profile than stock. Check the clearance between your lower front valance and this bumper's geometry — some aftermarket valances or diffusers may need trimming or repositioning to sit flush. Measure both the old and new bumper before final installation.