Do these over fenders require modification to the original fenders?

No modification to OEM fenders is needed. These are designed as bolt-on pieces that sit over the factory panel. Verify your vehicle's original fender condition and ensure all mounting points are accessible before installation.

What prep work should I do before painting?

Sand the surface with appropriate grit to promote paint adhesion, then wipe clean of all dust and debris. Apply your chosen primer and topcoat system according to paint manufacturer specifications. Proper surface prep ensures long-lasting finish durability.

Will these fenders fit with wider tires or lowered suspension?

Over fenders are designed to accommodate modest wheel and tire upgrades. Test fit or verify your wheel offset and tire sidewall height against the fender opening before final installation to ensure adequate clearance throughout suspension travel.