Do I need fasteners to install these?

Yes — you'll need bolts to secure the fenders to factory mounting points. Check your vehicle's service manual or repair guide for the correct fastener size and torque spec. Most over fenders use standard metric hardware available at any auto parts supplier.

What prep is needed before painting?

Sand the entire surface lightly to improve paint adhesion, then clean off all dust. Apply a primer suited to plastic surfaces, then sand again before your topcoat. Follow your paint manufacturer's prep guidelines for best results on FRP.

Will these fit with my current wheels and suspension?

Over fenders add width to the body line but do not affect wheel fitment or suspension geometry. Verify clearance with your current wheel offset and diameter before installation — measure the gap between the wheel edge and fender at full lock and at ride height to confirm adequate space.