Audi A4 B9 Tuning – Upgrade for the bestseller

The Audi A4 (B9 series) is the perfect blend of everyday practicality and sportiness. With Maxton Design, you can significantly enhance its sporty character. Whether you drive an A4 Avant S-Line , an S4 , or the powerful RS4 – we have the kit that will sharpen your lines. Select your exact model year (pre-facelift or facelift) below!

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Maxton Design Frontippe
Front splitter
Maxton Design Seitenschweller Erweiterung
Side Skirts
Maxton Dsign Hechdiffusor
Rear diffuser
Maxton Design Seitliche Heckerweitungen
Rear diffuser side
Maxton Design Spoiler Cap
Spoiler Cap
Maxton Design Zentaler Hinterer Splitter
Rear splitter
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57 products

Zentraler Hinterer Splitter für Audi S4 B9 Facelift von Maxton DesignZentraler Hinterer Splitter für Audi S4 B9 Facelift von Maxton Design
Central Rear Splitter for Audi S4 B9 Facelift by Maxton Design
Sale price€159,00
Seitliche Heck Diffusor Erweiterung für Audi S4 B9 Facelift von Maxton DesignSeitliche Heck Diffusor Erweiterung für Audi S4 B9 Facelift von Maxton Design
Side rear diffuser extension for Audi S4 B9 facelift by Maxton Design
Sale price€89,00
Front Lippe / Front Splitter / Frontansatz für Audi A4 Competition B9 von Maxton DesignFront Lippe / Front Splitter / Frontansatz für Audi A4 Competition B9 von Maxton Design
Front lip / front splitter / front apron V.2 for Audi A4 Competition B9 by Maxton Design
Sale price€199,00
Zentraler Hinterer Splitter für Audi A4 Competition B9 von Maxton DesignZentraler Hinterer Splitter für Audi A4 Competition B9 von Maxton Design
Central Rear Splitter for Audi A4 Competition B9 by Maxton Design
Sale price€249,00
Zentraler Hinterer Splitter für Audi A4 B9 S-Line Facelift von Maxton DesignZentraler Hinterer Splitter für Audi A4 B9 S-Line Facelift von Maxton Design
Central Rear Splitter for Audi A4 B9 S-Line Facelift by Maxton Design
Sale price€249,00
Front Lippe / Front Splitter / Frontansatz V.2 für Audi S4 B9 Facelift von Maxton DesignFront Lippe / Front Splitter / Frontansatz V.2 für Audi S4 B9 Facelift von Maxton Design
Front lip / front splitter / front apron V.2 for Audi S4 B9 facelift by Maxton Design
Sale price€199,00
Front Lippe / Front Splitter / Frontansatz V.1 für Audi S4 B9 Facelift von Maxton DesignFront Lippe / Front Splitter / Frontansatz V.1 für Audi S4 B9 Facelift von Maxton Design
Front lip / front splitter / front apron V.1 for Audi S4 B9 facelift by Maxton Design
Sale price€199,00
Seitliche Heck Diffusor Erweiterung V.2 für Audi A4 B9 8W S-Line von Maxton DesignSeitliche Heck Diffusor Erweiterung V.2 für Audi A4 B9 8W S-Line von Maxton Design
Side rear diffuser extension V.2 for Audi A4 B9 8W S-Line by Maxton Design
Sale price€159,00
Seitliche Heck Diffusor Erweiterung V.3 für Audi A4 B9 8W S-Line von Maxton DesignSeitliche Heck Diffusor Erweiterung V.3 für Audi A4 B9 8W S-Line von Maxton Design
Side rear diffuser extension V.3 for Audi A4 B9 8W S-Line by Maxton Design
Sale price€199,00

Aerodynamics & Accessories for Audi A4 B9 and RS4

The B9 platform is versatile, and so is our product range. We differentiate precisely between the models to ensure everything fits:

  • A4 S-Line / S4: Our front splitters are bestsellers here, as they make the sporty front end appear even lower. For the rear, we offer diffusers that perfectly frame the tailpipes (or trim pieces on the facelift model).
  • RS4 B9: For the top model, we have parts that make the "widebody" even more imposing.
  • Facelift (B9.5): Pay attention to the model year! Audi changed the headlights and bumpers starting in 2019. Our filters will help you find the right part for your model.
  • Material: Robust ABS plastic in high-gloss black – matching the "Black Optics Package".

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