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Enhance your Subaru WRX STI's performance with the K&N Engineering Cold Air Intake System, designed specifically for models from 2018 through 2021. This system features a mandrel-bent aluminum intake tube that ensures smooth airflow, contributing to increased horsepower and torque. The oversized conical high-flow air filter uses oiled cotton media, providing maximum filtration efficiency while allowing for up to 100,000 miles of use under normal highway driving conditions. The washable and reusable filter helps reduce maintenance costs and environmental impact, making it an economical choice for enthusiasts. A dedicated heat shield or air box is included to shield the intake from engine bay heat, ensuring cooler, denser air enters the engine for optimal combustion. Installation is straightforward and can typically be completed in less than 90 minutes, making it accessible for DIY enthusiasts or professional installers alike. Please note that this intake system is not CARB-approved, so it is intended for off-road or racing applications only and may not be legal for on-road use in California.
Features:
Fitment:
2018 Subaru WRX STI Base
2018 Subaru WRX STI Limited
2018 Subaru WRX STI Type RA
2019 Subaru WRX STI Base
2019 Subaru WRX STI Limited
2019 Subaru WRX STI S209
2020 Subaru WRX STI Base
2020 Subaru WRX STI Limited
2021 Subaru WRX STI Base
2021 Subaru WRX STI Limited
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).
