Q: What’s the best body kit for a 2021+ Model S that actually improves performance?

Look for a kit engineered for aero rather than styling alone. Many aftermarket Model S body parts chase looks with inferior materials. This one is lightweight carbon fiber, extensively tested to improve downforce and aerodynamic efficiency, so it sharpens high-speed behavior while it cleans up the styling. Front diffuser plus long tail spoiler is the combination that changes how the car feels at speed, not only how it photographs.