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Improve airflow to breathe power into your STI
000 psi tensile strength and cadmium plated for extra durability
this kit has you covered
It is recommended to upgrade the OEM wiring to get the maximum potential out of high-current and high-flow pumps
K&N Replacement Air Filter - 2019-2021 Subaru WRX / STI Hyundai-Elantra-N-2024 Improve airflow to breathe powerK&N washable, reusable High Flow Air Filters feature a state of the art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&Ns 10 Year Million Mile Limited Warranty. K&N drop in replacement filters are designed to install easily into your