The CUSTUNING rear diffuser provides a defined architectural finish to the lower rear fascia of the 2017-2023 Tesla Model 3 (MK1). Constructed from durable polypropylene, this three-piece assembly frames the rear of the sedan with a sharp, multi-dimensional look that transitions smoothly into the factory bumper lines while adding a technical touch via its carbon-patterned winglets. 01 Key BenefitsFeatures Modular 3-Piece AssemblyThe main valence and dual side winglets create a layered visual profile that adds depth and a custom-built character to the rear of the Model 3. Integrated Carbon FinishWhile the primary structure is matte black polypropylene, the flanking winglets feature a printed carbon-like weave pattern to deliver a high-contrast, restyled aesthetic. 02 Vehicle CompatibilityFitment Year Make Model (Chassis) Body Style Fitment Notes 2017-2023 Tesla Model 3 (MK1) Sedan Compatible with all sub-models and trim levels.