Will this lip interfere with my bumper seal or trunk line?

The T-style profile is designed to sit flush with the factory bumper edge without interfering with the seal. Before install, test-fit the panel to confirm alignment with your specific bumper condition — any rust, dents, or non-original hardware can affect how the lip seats. Sand and prep both surfaces for best results.

Should I use adhesive or drill through the bumper to mount this?

Mounting method depends on your bumper material and condition. Most buyers opt for drilling through the existing factory hole pattern and using hardware to clamp the lip tight. Adhesive-only mounting is possible on clean, primed surfaces, but mechanical fastening provides longer-term security. Choose the method that suits your bumper's condition and your comfort level.

Will this stay stable at highway speeds?

FRP lips are stable at speed when properly mounted and aligned. The key is secure fastening and ensuring the lip is flush along its entire length. Any gaps or loose sections can cause vibration — so take time during install to get the panel sitting evenly before final fastening. Primer finish allows you to apply your paint finish, which adds a protective seal.