CarbonXtreme BMW F90 M5 Diffuser CS Style Carbon Fiber With Light
The F90 M5 Diffuser by CarbonXtreme is an advanced, performance-driven upgrade for BMW F90 M5 owners who want to elevate the styling and aerodynamics of their vehicle. Designed in the CS Style, this carbon fiber rear diffuser not only enhances the aggressive look of the M5 but also improves the vehicle’s aerodynamics for better stability at high speeds.
This rear diffuser is made from premium carbon fiber and is available in two material options:
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Dry Carbon Fiber (Aluminum Mold): This pre-preg carbon fiber is cured under high pressure and temperature, ensuring a strong, lightweight, and durable component. Dry carbon fiber is ideal for performance enthusiasts looking for high strength and precision. The installation requires no drilling, fitting seamlessly to your car’s OEM mounting points.
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Wet Carbon Fiber (Hand-Laid): A more affordable option, offering a similar visual appeal to dry carbon but with slightly less rigidity. Wet carbon is a great choice for cosmetic upgrades. It may require minor adjustments during installation due to slight deformations that can occur during shipping.
For more details on the differences between dry carbon and wet carbon, check out our full guide:
Dry Carbon vs. Wet Carbon – What’s the Difference?
The F90 M5 Diffuser comes with an integrated light feature, adding a modern and unique touch to your M5’s rear end. The light feature provides enhanced visibility at night, giving your vehicle a high-tech, futuristic look. It’s designed to be seamlessly integrated into the diffuser, ensuring that the diffuser maintains its sleek and aggressive lines while providing a functional light element that can be turned on during low-light conditions. This added feature further elevates the overall aesthetic and driving experience, ensuring that your M5 stands out even in the dark.
Designed for OEM-level fitment, the installation process uses OEM mounting points and automotive-grade adhesive, ensuring a secure fit without the need for drilling. This installation method preserves the vehicle’s original structure while offering an easy, clean upgrade.
Finished with a UV-resistant gloss clear coat, this rear diffuser is built to withstand environmental damage, keeping its vibrant carbon fiber finish intact. The gloss finish prevents yellowing, fading, and oxidation, ensuring your M5 continues to look sharp for years to come.
Whether you’re upgrading for aesthetics, aerodynamics, or both, the CarbonXtreme F90 M5 Diffuser with Light is the perfect addition to your build.
Product Type: Rear Diffuser
Fitment: BMW F90 M5
Style: CS Style
Material Options: Dry Carbon Fiber / Wet Carbon Fiber
Surface Finish: Gloss UV-protected clear coat
Installation Method: OEM mounting points + adhesive (no drilling required)
Aerodynamic Function: Improved airflow, reduced rear-end lift
Fitment Precision: OEM-level precision, seamless integration
Use Case: Aesthetic upgrade, lightweight performance
Integrated Light: Yes
Installer Recommendation: DIY-friendly or professional installation
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Precision Shipping - Clear timelines with proactive updates, ensuring your order moves seamlessly from production to delivery.
Craftsmanship Guarantee - Every part undergoes strict quality inspection and secure packaging before dispatch.
Fitment Confidence - OEM-based design and professional after-sales support to ensure proper installation.
CarbonXtreme BMW F90 M5 Diffuser CS Style Carbon Fiber With Light
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Precision Fit
Upgrade with Confidence
Designed for Precision Fitment
Every CarbonXtreme part is developed from OEM CAD references and vehicle scans to match factory mounting geometry and edge radii. Metal tooling and dedicated jigs control hole positions and panel curvature, supporting consistent alignment across production runs. We engineer vehicle-specific clips and brackets for the original cavities to reduce trimming and rework. Each batch undergoes dry-fit checks and dimensional sampling before packaging to help installers achieve a predictable, secure fit.
Note: As composite aftermarket parts, minor adjustment may be required depending on vehicle history and bumper tolerances
Crafted for Lasting Clarity.
At CarbonXtreme, every carbon fiber part undergoes meticulous finishing to ensure premium quality and lasting durability. All products are coated with BASF Glasurit clear coat, applied in 3–4 layers to achieve a smooth, mirror-like surface with strong UV and yellowing resistance. This finishing standard is our foundation, providing customers with a level of refinement far beyond common aftermarket products.
Crafted for Lasting Clarity
For enthusiasts with higher expectations, we also offer a premium upgrade option: the Glasurit 923-447 (BASF) clear coat. Known for its scratch resistance and micro self-healing capability, this finish minimizes swirl marks under sunlight and delivers a showroom-grade gloss. Due to its demanding spray conditions and extended curing process, this option requires longer lead times and accounts for roughly 30% of the product’s value. It is reserved for customers who seek uncompromising quality and perfection.
No matter which option you choose, CarbonXtreme ensures that every piece reflects our pursuit of excellence—combining aesthetics, durability, and performance in one.
Product details
Customer Options & Support
We go beyond standard aftermarket solutions by offering customization options. Many of our front grilles and intake ducts can be equipped with protective mesh covers to prevent insect or debris intrusion. If the product you want does not include this option, our team can add it upon request.
For larger panels such as carbon fiber trunk lids or hoods, we also provide a pre-delivery vinyl wrap service. Choose your desired color or finish style, and we will apply it before shipment—saving time and labor in your market.
Additionally, for smaller parts like front lips or rear spoilers, some of our clients have requested and received protective films (clear or matte PPF) applied before shipment. This option is available upon request for those who want added surface protection.
Production & Delivery
Most of our products are made to order rather than kept in stock. Processing times may vary depending on the item, but we will always confirm an estimated delivery schedule with you after purchase. If you need faster delivery, please contact us—we will do our best to provide an accelerated option depending on factory and logistics availability.
Why CarbonXtreme
All of our products are finished with BASF Glasurit clear coat in 3–4 layers, delivering strong UV resistance and long-term gloss retention. For high-standard builds, we also offer an upgrade to PPG 447 clear coat for an even deeper, mirror-like shine.
Beyond strength and lightweight benefits, the real hallmark of premium carbon fiber is its surface flatness and visual refinement. Cheap parts often look wavy under direct light, while our finishing process creates a smooth, distortion-free reflection. This is what gives our dry carbon parts a visibly superior look—so refined that your friends will instantly recognize them as true high-end upgrades.
Warranty & Support
Every order is fully protected. If you receive a product that is damaged in transit or shows structural issues, we will immediately provide a replacement or arrange a fair solution. Just contact us with proof, and our team will handle the rest—you won’t be left bearing unnecessary losses. We are in this for the long run, and your second order is the highest recognition of our commitment.
FAQs
Please read our FAQs page to find out more.
Will this fit my exact model, trim, and year (LCI/Pre-LCI, M Sport vs. base)?
Yes—fitment follows OEM geometry. At checkout we require your vehicle details (model/year, trim, LCI/Pre-LCI, bumper type/photos) and perform a second verification. If your selection doesn’t match your vehicle, we’ll alert you before fulfillment to correct it.
What if I have aftermarket bumpers or prior bodywork?
Aftermarket bumpers and vehicles with prior collisions or repairs (even minor scrapes) can alter mounting geometry, which may cause installation difficulty. We’ve seen cases where a previous accident left the bumper deformed, making parts hard to seat—this is not a product defect. Please have your installer inspect mounting points before ordering.
Do I need to drill or cut?
Dry carbon: installs via factory mounting points; no drilling is generally required, except some rear wings that may require trunk drilling.
Wet carbon: due to process characteristics and possible deformation during transit or humidity changes, self-tapping screws may be needed to secure fitment.
Will the carbon tone match if I replace a single piece later?
Single-piece replacements are available. Minor batch-to-batch tone variance is normal; for perfect symmetry on L/R paired parts, replacing as a set is recommended. If you purchased from us and later damaged a part in a collision, send photos— we can usually offer a returning-customer discount on the replacement.
Will sensors, radar, PDC, and tow-hook access still work?
Some carbon grilles include pre-cut radar/PDC windows. Please review product photos carefully or provide OEM front-end photos before ordering. We typically re-confirm before shipment. If a misread leads to the wrong variant being ordered, exchanges are possible, but additional shipping costs may apply.
Can I choose gloss vs. matte or request specific finish options?
Standard is multi-layer BASF (Glasurit) gloss. Matte clear and special finishes can be built to order; lead time will differ.
What’s included in the box? Will I need extra hardware or tape?
Each product page lists what’s included. Vehicle-specific clips/brackets are included when required; high-bond tape or fasteners are provided where applicable. If an item needs OE hardware reuse, we’ll state it clearly.
What happens if my item arrives damaged?
You’re covered. Contact us within 48 hours with photos of the outer box, inner packaging, labels, and the part. We’ll arrange a replacement or a fair resolution at no extra cost. Keep the packaging until we confirm next steps.
What payment methods do you accept? Is it secure? Under which law?
We accept PayPal and Useepay, settling in USD via secure gateways with industry-standard encryption and fraud screening. Our Terms are governed by UK law.