VTEN Gloss Black Rear Roof Window Spoiler For BMW 4 Series Gran Coupe (G26) 2021-2027

Sharpen the sloping roofline of your 4-door coupe with the VTEN Gloss Black Rear Roof Window Spoiler. Custom-engineered for the 2021–2027 BMW 4 Series Gran Coupe and i4 (G26 chassis), this aerodynamic upper window extension bridges the transition from the roof to the rear glass, adding an aggressive, motorsport-derived accent that completes your exterior styling.

Product Features:

• Sleek Aerodynamic Profile: Designed to hug the top edge of the rear windshield, extending the fastback roofline for an elongated, lower-slung silhouette.

• Premium High-Gloss Black Finish: Molded from high-impact, automotive-grade ABS plastic finished in a mirror-deep gloss black. Coated with a multi-layer UV-resistant clear coat to prevent fading, clouding, and sun discoloration.

• Aerodynamic Airflow Smoothing: Helps direct high-velocity air cleanly off the rear glass edge, reducing turbulence and complementing rear trunk lid spoilers or diffusers.

• Precision G26 3D Scan Fitment: Engineered using 3D digital scans to ensure an exact contour match against the factory curvature of the upper rear window across all 2021–2027 BMW G26 models (430i, M440i, and i4 Gran Coupe).

• Lightweight & Durable ABS: Built to withstand automated car washes, high-velocity highway wind resistance, and extreme temperature variations without warping or cracking.

• Non-Invasive Tape-On Installation: Installs flush without drilling or modifying factory glass or body panels, utilizing automotive-grade heavy-duty double-sided acrylic foam tape for a clean, weather-sealed bond.

Specifications