Cold Air Intake for Subaru Impreza WRX STI (2015-2020) 2.5L Turbo EngineHigh Flow Cold Air Intake for 2015 2020 Subaru WRX STi (EJ257 VA) What It Does: Replaces the restrictive factory air box and corrugated induction hose with a mandrel bent aluminum tube and high flow filter to lower intake air temperatures and improve turbo spool. The Stock WRX STi Induction Bottleneck The factory intake system on the EJ257 engine is engineered primarily for NVH (Noise, Vibration, and Harshness) reduction rather than maximum flow. The
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Cold Air Intake for Subaru Impreza WRX STI (2015-2020) 2.5L Turbo Engine