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2015-2021 Subaru STI
Take your STI’s performance to the next level with the HKS Racing Suction Intake System. Engineered to address airflow turbulence found in the factory intake, this system replaces the restrictive, corrugated OEM piping with a smooth, high-flow aluminum pipe and a high-performance air filter—resulting in better throttle response, improved airflow, and more power.
Designed with both performance and reliability in mind, the intake can be used with the stock air duct and ECU, or paired with a tune for maximum gains.
Reduced Airflow Restrictions
Smooth aluminum intake pipe replaces factory corrugated tubing to allow more efficient airflow directly to the turbocharger.
New Stealth Frame Filter Design
Hyper Stealth Filter Frame increases surface area by 27%, enhancing intake efficiency and filtration.
Removable Air Duct
Offers flexibility for different tuning setups—retain the duct for OEM compatibility or remove for more airflow with a tune.
Flow Bench Tested
HKS developed this system using real-world flow bench testing to ensure optimized performance under various conditions.
OEM Compatibility
Works with the stock ECU when the air duct is retained. Tune recommended for best results or when duct is removed.
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