Q: How much aero engineering actually went into these parts?

The Efficiency Rear Spoiler was developed through 143 CFD-driven simulations to delay flow separation, cut drag, and add rear stability. The Aero Mirror Covers carry CFD-tested vortex generators along the inner edge to encourage airflow attachment and reduce local turbulence. Those two are the functional aero. The Lip Cover and Diffuser Trim are styling pieces that respect Tesla’s low-drag geometry rather than change it.