AEM Induction Cold Air Intake For 2018 Subaru WRX STI 2.5L. The AEM Induction 21-836WR Cold Air Intake System is a performance upgrade designed to improve airflow and engine response for the 2018 Subaru WRX STI with a 2.5L engine.
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AEM 21-836WR Performance Red Cold Air Intake System for 2018 Subaru WRX STI 2.5L
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