Will this interfere with the trunk seal or gasket?

This rear diffuser is designed to sit below the trunk line without pinching seals. Check your vehicle's existing rear bumper geometry before installation — if your factory bumper sits flush to the body, this piece will not create seal conflict.

What surface prep do I need before painting?

Sand the entire surface with medium-grit abrasive to scuff the primer coat, then wipe clean of dust. This opens the surface for adhesion of your base coat and clear. Follow your paint system's prep guidelines for best adhesion.

How stable is FRP at highway speeds?

FRP panel rigidity is solid at speed — the material's construction resists flex and vibration. Ensure all mounting points contact the body securely and verify fastener torque before driving. Proper installation is key to vibration-free performance.