Will this rear lip interfere with the trunk seal or weatherstripping?

The Taveran profile sits at the rear bumper edge and is designed to clear the trunk opening. Before final fitment, check that the diffuser pieces align flush with your bumper's existing cutouts. Slight trimming of the weatherstrip may be necessary depending on your vehicle's tolerance stack.

Should I use adhesive or drill through the bumper to secure these diffusers?

Both methods are common with FRP diffusers. Adhesive-based installation preserves bumper integrity and allows removal without damage; drilling provides permanent, vibration-proof mounting. Choose adhesive if you prefer reversibility, or drill if you want maximum stability during highway driving. Ensure the mounting surface is clean and dry before committing to either method.

How should I prepare the FRP surface before painting?

Sand the surface with appropriate grit to establish adhesion for your chosen topcoat, then clean thoroughly to remove dust and oils. Consult your paint supplier's prep guidelines for compatibility with your selected finish system. This ensures color match and long-term durability.