1-4 DAYS DELIVERY
2014-2020 BMW M3 F80 & M4 F82 SM Style Carbon Fiber Rear Diffuser and Lip
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100% ORIGINAL & HIGH-QUALITY
1-YEAR WARRANTY
Description
Description
Shop premium parts to enhance your vehicle's performance, style, and customization with high-quality upgrades. This SM Style Carbon Fiber Rear Diffuser and Lip kit transforms the rear end of your M3 or M4 with a dynamic, motorsport-inspired finish.
Engineered for precision fitment, the carbon fibre components improve aerodynamics while adding a bold, aggressive appearance that stands out on the street or track.
Fitment: 2014–2020 BMW M3 F80 / M4 F82
Package Contents:
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One Rear Lip
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One Rear Diffuser
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One Pair of Side Caps
Shipping Policy
Shipping Policy
United States: Free shipping available to the lower 48 states across all items. Other states will incur a shipping charge.
Worldwide: Free shipping is available for Complete Headlights, Taillights, DRLs. For custom headlight retrofits, carbon fiber products, and performance products, there will be a shipping charge.
Please note:
• For Retrofits, you are purchasing a headlight modification service.
• If you select "Shipping own headlights to BayOptiks for modification", you are required to send us your headlights.
• If you choose "Purchase new OEM headlights", we will order and modify a new OEM headlight for you.
• Once your customizations are complete, we will ship it to you!
Turnaround Time
Turnaround Time
- Complete Headlights: 3-5 business days for order processing plus shipping time.
- Custom & Pre-Built Headlights: 6-8 weeks depending on the complexity and component availability.
- New OEM and cores: 6-8 weeks plus an additional 4-8 weeks as these are special orders base on the vehicle VIN due to different versions (North American, European, etc.)
- DRLs, Taillights, Brake Pads, and Carbon Fiber Aero: 3-5 business days for order processing, plus shipping time.
- Lens Replacements: 1-3 weeks plus shipping time.
Please note, we do not have control over the time frames of our vendors, manufacturers, and delivery services as they may delay processes in regards to components and shipment.

















