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The HKS 70026-AF004 Cold Air Intake Full Kit is a precision-engineered upgrade for the 2015–2021 Subaru WRX STI VAB equipped with the EJ257 engine. Designed to enhance airflow and boost engine performance, this intake system delivers improved throttle response, increased horsepower, and smoother acceleration.
Built from durable, high-quality materials, the HKS intake system resists heat soak and ensures consistent performance under demanding driving conditions. Its design maximizes air volume and flow efficiency while maintaining excellent filtration for reliable, long-term use. The result is improved combustion, sharper throttle feedback, and a more responsive driving experience.
Installation is straightforward thanks to the kit’s direct-fit design and included hardware. While not CARB approved, it is ideal for off-road or track applications where emissions compliance is not required. As a trusted name in performance engineering, HKS ensures that this intake system meets the high standards demanded by Subaru enthusiasts worldwide.
Features:
Designed specifically for Subaru WRX STI VAB with EJ257 engine (2015–2021)
Complete intake kit includes filter, piping, and installation hardware
Improves airflow for increased horsepower and throttle response
High-quality materials ensure durability and heat resistance
Direct-fit design for easy installation and precise alignment
Delivers enhanced engine sound and performance feel
Not CARB approved; for off-road or track use only
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
