Carbon Fiber Parts
BMW F82 M4 FRP Rear Diffuser
OEM/ODM · 100% Fitment · Global Shipping · Customization Available
JC AUTOCARBON builds this FRP rear diffuser for the BMW M4 2014-2020. It fills the rear bumper and frames the exhaust area. The FRP construction stays durable in everyday driving. Custom colors or finishes can be made on this mold. Low MOQ welcome.
Product Details
Studio Shots / Detail Shots
Size & Weight
Measured & Weighed / Dimensions & Weight
BMW M4 F83 · 2014–2020 · CONVERTIBLE
What Can You Customize & How We Work With You
In-stock parts shipping from overseas warehouses, made-to-order production from existing molds, or full custom development from your drawings — pick the model that fits your business.
Most products shown on this site are stocked in our fixed overseas warehouses in China, the US, and other partner regions, with warehouse fulfillment supported. Before ordering, you can confirm stock and pricing with us — availability and prices vary by region.
One Piece or Many — Packed & Shipped
From our overseas warehouse directly to your end customer. One piece at a time, or multiple items combined in a single parcel — you focus on sales, we handle packing and last-mile handover.
- Ships from overseas warehouses
- Single or multi-item fulfillment
- No inventory investment required
Check Stock & Price by Region
Inventory levels and pricing differ between regions. Send us the part, your destination country, and quantity — we'll confirm live stock and a region-specific price before you commit.
- Live stock confirmation
- Region-specific pricing
- Reply within 12 hours on business days
* Times marked est. are typical estimates — we confirm exact timing for your destination before you order.
Every product on this site has been produced before — the molds already exist. No tooling fees, no waiting for mold development: pick your material, weave, finish and color, and production starts as soon as your order is confirmed. Send us an inquiry and we'll confirm mold availability for your model within 12 hours.
Material
Wet carbon, dry carbon (prepreg), or FRP — matched to how the part is used.
Weave Pattern
2×2 twill, 1×1 plain, forged carbon, hybrid weave, Kevlar mix.
Surface Finish
High-gloss, matte / satin, UV-protection coating as standard.
Color Effect
Beyond black — Kevlar hybrids, candy tints, Texalium, flake forged.
* Times marked est. are typical estimates and vary with quantity, finish and destination — confirmed in your quote.
Need something that doesn't exist yet? We develop fully customized parts based on your target vehicle, CAD files, or design drawings — with dedicated mold tooling quoted separately. From a single trim piece to a complete body kit program, engineered and produced under your brand.
Full Custom Development
3D scanning, fitment validation, structure design, mold tooling, prototyping and mass production — one engineering team handles the entire process.
- Custom design & engineering support
- Prototype in days, production at up to 1,000 parts per day
- MOQ from 20 units per part
Produced Under Your Brand
Your logo, your packaging, your product line. We stay behind the scenes as your manufacturing partner — designs and molds developed for you stay exclusive to you.
- Private label packaging available
- OEM & ODM programs
- Design & IP protection
* After design data is confirmed, most projects complete first samples in 45–58 days. Early design and confirmation time are not included.
Factory-Direct Carbon Fiber,
Built for You
Custom parts engineered and manufactured in-house — from one-off samples to bulk orders.
Free quote · No obligation · Takes about 1 minute
In a hurry? Chat on WhatsApp →
Working hours: Monday – Saturday, 9:00 – 18:00 (GMT+8)
Related Carbon FIber Parts – For SAME MODEL
SELECTED CUSTOM packages
Why Choose JC AUTOCARBON
Engineering-Driven Carbon Fiber Manufacturing
JC AUTOCARBON is the automotive-focused platform powered by JCSPORTLINE’s global carbon fiber engineering and manufacturing capabilities.
Built on years of composite engineering experience, we provide complete support from product concept, engineering development, and tooling to mass production.
Through JC AUTOCARBON, automotive professionals and brands access reliable carbon fiber solutions backed by proven manufacturing capability.
150,000 m²
Manufacturing Area
80+
CNC Machines
1,000+
Parts & Sets Per Day
5,000+
Completed Projects
ISO 9001 · IATF 16949 · CE Certified Quality Management
Latest from the Blog
-
Carbon Fiber vs Aluminum: Strength, Weight & Cost Compared (Real Data)
-
Dry Carbon vs. Wet Carbon: What’s the Difference and Which Should You Choose?
-
Carbon Fiber Fabrication Explained: Material Preparation, Manufacturing Steps & 5 Molding Methods Compared
-
Carbon Fiber Rapid Prototyping: Timeline, Cost, and Our 58-Day Process
-
Carbon Fiber Front Lip Installation Guide: Factory Screws, 3M Tape & Race Kits
-
Carbon Fiber Rear Spoiler Installation Guide: 3M Tape, Factory Screws & GT Wings
-
Carbon Fiber Rear Diffuser Installation Guide: Bumper Removal, Sensors & Factory Clips
-
Carbon Fiber Side Skirts Installation Guide: Factory Screws, Clips & Tape Zones
MOQ 20 PCS
Low minimum order
100% Fitment
Perfect fit guaranteed
OEM / ODM
Custom development
Golbal Shipping
Worldwide delivery