2018 - 2021 McLaren 600lt Carbon Fiber Under Rear Diffuser Undertray

Enhance the aerodynamic efficiency and rear-end protection of your McLaren 600LT with this Carbon Fiber Under Rear Diffuser Undertray. Designed to complement your existing diffuser setup, this undertray optimises airflow beneath the vehicle while adding structural rigidity and an aggressive visual finish.

Constructed from lightweight, high-strength carbon fibre, this undertray offers a sleek performance upgrade that fits perfectly with the 600LT’s aggressive styling. Ideal for track use or premium street builds, it delivers functional aero with high-end appeal.

Fitment: 2018–2021 McLaren 600LT
Package Content: One carbon fiber under rear diffuser undertray

Made To Order Shipping Information Made-to-Order Items: If a material option shows "MADE TO ORDER", it means that specific option is currently out of stock and will be produced upon order. Customers can choose from the following shipping methods: * Standard Shipping And Handling (no extra cost) with an ETA of 3-4 months. * Expedited Shipping And Handling (additional cost: $550) with an ETA of 5-6 weeks. In-Stock Items: If a product does not display "Made To Order" when selecting a material option, then it is in stock. It will be shipped from our warehouses within 3-5 business days, plus shipping time.

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!

• 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.