This is the newly released Dry Carbon Competition Rear Diffuser for the F80 M3 and F82 / F83 M4. It is designed to mount directly to the lower rear factory bumper for an easy and quick installation. This carbon fiber diffuser is crafted with 100% genuine pre-preg technology for the ultimate in lightweight, high durability, and precise fitment. The AutoTecknic Dry Carbon Fiber Diffuser offers excellent visibility and functionality.
The name "Dry Carbon Fiber" comes from its manufacturing process. Dry carbon fiber is formed using "pre-preg" or impregnated carbon material. This piece of carbon is first placed into a mold and then placed into a sealed autoclave to cure properly. This specific method minimizes the amount of impurities and creates a carbon that is lighter than the "wet" method. Because the autoclave vacuuming process is used when producing dry carbon, there are fewer pinholes and virtually no air bubbles in the carbon. Dry carbon is the highest quality carbon fiber product produced.
Before Ordering
〇 Regarding Import Consumption Tax
At Shafutoya Shopping Site, we pay the import consumption tax incurred at the time of import on your behalf, so there are no additional charges beyond the total amount paid at checkout.
〇Confirmation of Compatibility
Since our entire product database is based on North American vehicles (USDM), please confirm the compatibility for Japanese vehicles (JDM) before ordering. (If you are unsure whether the listed product fits your vehicle, please feel free to contact us. Our support team will check it for you.)
If you place an order without confirming compatibility, we cannot accept returns due to incompatibility.
Please note that even if products are sorted by selecting the model year, manufacturer, and vehicle model using the tabs on our top page, this does not necessarily mean they will fit Japanese model vehicles without modification.
All products have been translated into Japanese using translation software. As there may be confusing expressions, please contact us before ordering if you have any questions.
○ Regarding Shipping
Shipping costs are paid at the time of payment. Shipping estimates are automatically calculated when you enter your shipping address on the checkout page. For large items such as body parts, there are rare cases where there is a significant difference between the automatically calculated shipping cost and the actual shipping cost. In such cases, we will contact you individually via email.
Basically, all products are shipped internationally from our US warehouse. Unlike domestic shipping within Japan, international shipping takes about 7 to 14 days, so please allow plenty of time for your order. If you are in a hurry, please contact us in advance to confirm delivery times. All products are transported by air; they are never shipped by sea freight.
○ Regarding Japanese Vehicle Inspection (Shaken) Compatibility
Essentially, all products handled by our company are designed and manufactured outside of Japan. Please note that they are not adapted to the "Japanese Vehicle Inspection System," and we cannot provide strength evaluation documents or similar paperwork for the Japanese inspection system. Therefore, all parts are sold for the purpose of "use on circuits, private land, and off-public roads," and installation and use are at your own risk.
○ Regarding Warranty
Please check the contents immediately upon arrival. As all products are shipped internationally from outside of Japan, there may be shipping damage to the packaging boxes or products. Please understand that we will only provide returns, refunds, or replacement exchanges for products with shipping damage, defective products, or items different from your order if you contact us within 7 days of receipt. Furthermore, for products sold through our company, all warranty-related support will be handled "exclusively through us." Please note that we do not handle support through other companies or distributors located within Japan.