Will this diffuser scrape on steep driveways or highway on-ramps?

The diffuser adds minimal extension below the stock bumper line. Check your current ground clearance at typical approach angles before installation — driveway slope and suspension height will determine clearance.

Is this functional or cosmetic?

This is an aesthetic piece that enhances the L Sport profile. It's styled to complement the rear design rather than generate downforce.

What prep and paint do I need before installation?

Sand and prep the primer surface with appropriate grit before applying your chosen finish. Once cured, mount directly to factory attachment points. Your body shop can match color if you're applying custom paint.