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Enhance your 2018-2021 Subaru WRX STI with the Injen Technology SP1208WB Cold Air Intake System, designed specifically for the H4-2.5L Turbo engine. This high-performance short ram intake replaces the factory airbox with an engineered solution that allows your turbocharged engine to breathe more freely, unlocking additional power and torque without the need for ECU tuning. Crafted from durable 6061-T6 aluminum with a sleek wrinkle black finish, the intake piping features smooth, mandrel-bent curves that eliminate restrictions and improve airflow for optimal engine response.
The system includes a custom-designed heat shield that reduces heat soak, ensuring cooler, denser air enters the engine for increased combustion efficiency. Injen's patented MegaRam (MR) Technology and SuperNano-Web dry air filter work together to provide massive power gains—up to 26 horsepower and 24 lb-ft of torque—verified through dyno testing. The fully serviceable filter makes maintenance straightforward, extending the lifespan of your intake system while maintaining peak performance.
Installation is simple as this system is a direct drop-in replacement requiring no additional tuning or modifications. Its aggressive engine tone under full throttle enhances driving experience, making every ride more engaging. Built in Pomona, California, USA, the Injen SP1208WB comes with a limited lifetime warranty, ensuring quality and durability for years to come. Available in multiple finishes, including wrinkle black, red, and polished, this intake system is a perfect upgrade for enthusiasts seeking both performance and style. Please note, this product is not CARB-exempt and is not legal for use in California on vehicles registered with the DMV, and an acknowledgment of Prop 65 is required for purchase.
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
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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).
