The diffuser works in conjunction with
By directing the high-speed airflow coming from under the car, the diffuser redirects the high-speed airflow to transition smoothly into the low-pressure vacuum at the rear. This creates a smoother flow of air under the car and improves the performance of other aerodynamic components, such as aerodynamic wings.
Before placing an order
〇 About Import Consumption Tax
At the Shaftoya shopping site, we pay the import consumption tax incurred at the time of import on your behalf, so there will be no additional charges beyond the total amount paid at checkout.
〇Compatibility Check
All product databases are based on North American vehicles (USDM). Please check whether the item can be installed on a Japanese vehicle (JDM) before placing your order. (If you are unsure whether a listed product is compatible with your vehicle, please feel free to contact us. Our support team will look into it for you.)
If you place an order without checking compatibility, we cannot accept returns due to incompatibility.
Please note that even if items are sorted by selecting the year, manufacturer, and vehicle model in 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 Delivery
Shipping costs are paid at the time of checkout. Shipping estimates are calculated automatically when you enter your shipping address on the checkout page. For large items such as body parts, there may occasionally be a significant discrepancy between the automatically calculated shipping cost and the actual shipping cost. In such cases, we will contact you individually via email.
All products are generally shipped internationally from our US warehouse. Unlike domestic shipping in Japan, international shipping takes about 7 to 14 days, so please allow yourself enough time when placing your order. If you are in a hurry, please contact us in advance to check delivery times. All products are transported by air. They are never shipped by sea freight.
○ Regarding Japanese Vehicle Inspection Compatibility
All products we handle are essentially designed and manufactured outside of Japan. Please be aware that they are not compliant with the "Japanese vehicle inspection system" in any way, and we cannot provide strength evaluation documents or similar paperwork for the Japanese vehicle inspection system. Therefore, all parts are sold for the purpose of "use on circuits, private property, or off-road," 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 Japan, there may be shipping damage to the packaging or the product itself. Please understand that we will only provide returns, refunds, or replacements for products with shipping damage, defective products, or items different from what was ordered if you contact us within 7 days of receipt. Furthermore, for products sold through us, we will provide warranty support "only through us." Please note that we do not provide support through other companies or distributors located within Japan.