Will these diffusers interfere with my trunk seal or rear bumper when installed?

The two-piece design sits low on the bumper profile and is engineered to clear the trunk seal by design. Verify your bumper's existing cutout dimensions match the diffuser footprint before installation to ensure clean fitment without gaps or pressure points.

Can I use adhesive to mount these, or do I need to drill into my bumper?

FRP diffusers can be mounted using quality automotive epoxy or polyurethane adhesive for a clean, no-drill install. For maximum security and adjustability during fitment, many builders prefer pilot holes with stainless fasteners. Choose the method that matches your bumper's material and your comfort level with permanent modification.

How stable are these at highway speeds?

The two-piece design distributes load across both bumper sides for balanced pressure. FRP's rigid structure resists flex and vibration once properly secured. Confirm fastener torque is even on both pieces and that mounting surfaces are clean and flat before driving to maintain stability.