https://www.cnet.com/roadshow/news/tesla-model-3-revozport-3r-body-kit/

Available in both gloss or matte finishes, this new look is certainly more aggressive — if a bit fussy — thanks to its unique front splitter with endcap uprights, as well as new side skirts. However, it's arguably the rear end, with its M3R GT decklid spoiler and a massive rear apron with prominent vertical vanes that's most likely to draw attention. 

The Model 3R body kit's aggressively vaned rear diffuser is its most dramatic element.