CarbonXtreme BMW G90 M5 Carbon Fiber MP Rear Diffuser
Factory DNA, Track-Born Precision
At CarbonXtreme, we don’t just sell carbon fiber—we build with it. For over 15 years, our family-run workshop has produced OEM-grade carbon components for race teams, tuning shops, and private builds. We started with a mold, not a logo—and this BMW G90 M5 Rear Diffuser continues that legacy of craftsmanship and functional performance.
Purpose-Built for Aerodynamic Performance
The CarbonXtreme MP Style Carbon Fiber Rear Diffuser is designed to enhance the rear-end airflow management of your G90 M5. The multi-fin layout helps channel turbulent airflow more efficiently, reducing rear lift while increasing stability at speed. Whether you’re carving through corners or accelerating down straightaways, this diffuser delivers race-bred function with daily drivability in mind.
Genuine Fitment, No Compromise
Precision-molded to follow the factory bumper contours, the diffuser uses OEM mounting points—no cutting, drilling, or custom work required. Laser-cut edges ensure a seamless installation that integrates perfectly with the M5’s aggressive styling. The gloss-coated carbon finish is UV-resistant and designed to preserve the deep 3D weave structure over time without yellowing.
Crafted, Not Assembled
Unlike mass-produced parts that focus on volume, our components are crafted under one roof—from material selection to final inspection. This rear diffuser is the result of hands-on expertise, meticulous finishing, and a relentless pursuit of perfect fitment.
Part of a Complete Aero Ecosystem
For those building a complete aerodynamic upgrade, this MP Style Rear Diffuser integrates perfectly with our full G87 M2 Upgrade To M2CS Full Aero Conversion Kit – 5-Piece Set, offering visual harmony and aerodynamic synergy from front to rear.
Whether you’re dialing in your aero for the track or adding race-proven style to your street build, the CarbonXtreme BMW G90 M5 Rear Diffuser is engineered to deliver real performance with real craftsmanship—no hype, no shortcuts.
Product Type: Rear Diffuser
Fitment: BMW G90 M5
Style: MP Style
Material Options: Dry 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
Installer Recommendation: DIY-friendly or professional installation
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Pairs well with
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 G90 M5 Carbon Fiber MP Rear Diffuser
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.