BMW 3 Series F30 F31 M Sport PERFORMANCE Style CARBON FIBRE Quad Exhaust Rear Diffuser

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The BMW 3 Series F30 F31 M Sport PERFORMANCE Style Wet Carbon Fibre Quad Exhaust Rear Diffuser is the ideal upgrade for BMW owners looking to elevate both the look and performance of their vehicle. Made from premium wet carbon fibre, this diffuser offers a sleek, glossy finish that not only turns heads but is also built to last. It stands up to the elements, ensuring your BMW stays sharp and stylish for years.

This diffuser is more than just a visual upgrade – it enhances your car’s aerodynamics as well. By guiding airflow smoothly underneath the vehicle, it improves stability and handling, especially at higher speeds. The result? A more responsive, controlled driving experience, particularly when you’re pushing your BMW to its limits on the road.

Designed for vehicles with a quad exhaust conversion – inspired by the F80 M3 – this diffuser features four exhaust outlets, giving your BMW a more aggressive, sportier look. Installation is quick and easy. The diffuser fits seamlessly with your rear bumper, requiring no complex adjustments, and pairs perfectly with your existing exhaust system.

Made from wet carbon fibre, the BMW 3 Series F30 F31 M Sport PERFORMANCE Style Wet Carbon Fibre Quad Exhaust Rear Diffuser is a smart upgrade that enhances both the performance and visual appeal of your car. It’s an easy way to bring your BMW closer to the performance and look of the iconic F80 M3, while improving handling and overall driving dynamics.

APPLICATIONS: 2012-2020 BMW 3 SERIES F30 F31 (M SPORT BUMPER ONLY)
PACKAGE INCLUDE: x1 REAR BUMPER DIFFUSER
MATERIAL: CARBON FIBER
COLOR: BLACK CARBON FIBER
FINISH: GLOSSY WITH UV CLEAR COAT
FITMENT: DIRECT REPLACEMENT AND SELF TAPPING SCREWS
HIGH-QUALITY AFTERMARKET PRODUCT
PROFESSIONAL INSTALLATION IS HIGHLY RECOMMENDED

ADDITIONAL INFORMATION:

Brand

PREPREG is a common term for a reinforcing fabric such carbon which has been pre-impregnated with a resin system. This resin system (typically epoxy) already includes the proper curing agent. As a result, the prepreg is ready to be laid into the mold without the addition of any more resin. In order for the laminate to cure, an autoclave production process is used, a combination of high pressure and heat.

  • Maximum strength and performance characterictics. In a hand layup production process, it is difficult to achieve 50% fabric and 50% resin content.  Typical hand laminates, even when vacuum bagged, end up with a significant amount of excess resin. Excess resin increases brittleness and reduces overall strength properties. On the other hand, most prepregs contain around 35% resin. This is ideal for maximum cured properties and generally impossible to achieve in normal hand lamination.
  • Uniformity and repeatability. The prepreg is of uniform thickness and each part coming out of the mold may theoretically be the same. Vacuum bagging technology may have some errors in processing, but prepreg ensures production consistency.
  • Reduce curing time. After the thermal curing cycle, no need to wait for the standard 48 hours can be fully cured.
  • Aesthetics. Although prepreg processing still requires mold preparation and demoulding, prepreg processing eliminates air bubbles, makes it easier to obtain a smooth, glossy surface as well as eliminates any seaming lines.

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Most orders dispatch within one business day (Monday to Friday). EU delivery takes 3–5 working days from dispatch, and tracking details will be provided via email once your order has shipped.

Please note that import taxes may apply outside the EU, and these are the responsibility of the buyer. Some items may ship directly from our suppliers and may have varying delivery times. If an item is out of stock, we will contact you to discuss the available options.

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RETURNS

Changed your mind? You can return unused, uninstalled items in original packaging within 30 days of delivery. Return shipping is the customer’s responsibility unless the item is faulty.

Custom, used, or built-to-order items are non-returnable.

Once we receive and inspect your return, refunds are typically processed within 10 business days.

If your item is damaged or incorrect, contact us within 48 hours with photos and order details.

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WARRANTY

All VA and VA Motorsports products come with a 1-year limited warranty covering manufacturing defects and fitment issues. For third-party items, warranty terms vary by brand—please check the product listing or contact us for details.

This warranty does not cover wear and tear, incorrect installation, cosmetic damage, labor, or third-party costs.

To start a claim, email us with your order number, issue description, and photos. If the claim is approved, we’ll offer a replacement, store credit, or a refund.

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BMW 3 Series F30 F31 M Sport PERFORMANCE Style CARBON FIBER Quad Exhaust Rear Diffuser
BMW 3 Series F30 F31 M Sport PERFORMANCE Style CARBON FIBRE Quad Exhaust Rear Diffuser