Will this interfere with my trunk seal or weatherstripping?

No — the rear lip mounts to factory attachment points below the trunk line. Verify your vehicle's existing rear bumper-to-trunk gap before installation to confirm clearance with your trim variant.

What prep is required before painting?

Sand the surface with appropriate grit to promote paint adhesion, then clean thoroughly before applying your chosen base coat and clear. Follow your paint manufacturer's guidelines for primer compatibility and application.

Does this diffuser improve aerodynamic stability at speed?

This is a styling piece — it adds visual aggression and street presence. For measurable aero benefits, rear diffusers require specific angle and channel design. Confirm your performance expectations against the G Force style profile before purchase.