Skip to product information
1 of 21

AEM 08-11 WRX/STi Wrinkle Red Cold Air Intake

AEM 08-11 WRX/STi Wrinkle Red Cold Air Intake

SKU:AEM21-478WR

Regular price 13,920.00 ฿
Regular price Sale price 13,920.00 ฿
(Duties & import taxes included)
Import Duties & Taxes

The displayed price includes import duties and taxes. In principle, no additional payment is required upon delivery. If the shipping carrier nevertheless charges you import duties or taxes upon delivery, please pay the charges first. Shaft Shop will reimburse you for the amount paid.

Sale Sold out
Shipping calculated at checkout.

In stock | Estimated delivery: 5–8 business days

International shipping rates are calculated at checkout.
Authorized U.S. Suppliers Sourced through authorized channels
Tracked International Shipping Track your shipment to your destination
Japanese & English Support Contact us about fitment and delivery
FAQs: Duties, Delivery & Fitment → View full details
The AEM 21-478WR Performance Cold Air Intake System increases horsepower and torque by replacing your vehicle's restrictive factory air filter and air intake box. This air intake system is designed, tuned, and dyno-tested to fit specific Subaru WRX, WRX STI, Impreza WRX, and Impreza WRX STI models. Air enters the system through an oversized AEM Dryflow synthetic washable air filter that provides excellent airflow, filtration, and performance. The air filter is placed in the factory air box space and is protected by a heat shield designed to reduce intake temperature and increase horsepower. The intake pipe is made of mandrel-bent aluminum with a durable textured red powder-coat finish. This air intake system was developed to accommodate the engine's factory emissions control devices, including the mass airflow sensor. The cylindrical AEM Dryflow air filter uses oil-free synthetic filter media that does not require cleaning for up to 100,000 miles (depending on driving conditions). This air intake system can be easily installed with common tools and comes with AEM's lifetime limited warranty. Note that some AEM air intakes are not legal for sale or use in California and other states adopting California emissions standards, while others are 50-state legal. Please refer to the 21-478WR vehicle application chart for the legal status of each vehicle.


Before Ordering

〇 Regarding Import Consumption Tax
At the Shaftoya shopping site, we pay the import consumption tax incurred at the time of import on your behalf, so you will not be charged any additional fees beyond the total amount paid at checkout.

〇Confirmation of Compatibility
Our product database is based on North American vehicles (USDM), so please confirm whether the product can be installed on a Japanese vehicle (JDM) before ordering. (If you are unsure whether the listed product is compatible with your vehicle, please feel free to contact us. Our support team will check 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 year, manufacturer, and vehicle model in the tabs on our top page, it does not necessarily mean they will fit Japanese models 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 fees are paid at the time of payment. Shipping estimates are calculated automatically when you enter your shipping address on the checkout page. For large items such as body parts, the actual shipping cost may rarely differ significantly from the amount automatically calculated. In such cases, we will contact you individually by email.

All products are generally shipped internationally from our U.S. warehouse. Unlike domestic shipping in Japan, international shipping takes about 7 to 14 days, so please order with enough time to spare. If you are in a hurry, please contact us in advance to confirm delivery times. Note that all products are transported by air. They are not shipped by sea freight.

○ Regarding Compliance with Japanese Vehicle Inspection (Shaken)
The products we handle are fundamentally all designed and manufactured outside of Japan. Please be aware that they are not compliant with the "Japanese Vehicle Inspection (Shaken) System," and we cannot provide strength calculation documents or similar paperwork for the Japanese inspection system. Therefore, all parts are sold for "use on circuits, private land, 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 contacted within 7 days of receipt. Please note that for products sold through us, warranty-related support will be handled "exclusively through our company." We do not provide support through other companies or distributors located within Japan.