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The COBB Air Box provides a direct-fit intake solution for 2015–2018 Subaru WRX STI when used with the Stage 1+ Power Package. It replaces the stock airbox to improve airflow into the turbo intake path while maintaining a simple bolt-on installation. The Air Box is intended to be paired with COBB Stage 1+ tuning for refined throttle response and compatibility.
Subaru 15-18 Subaru STI Stage 1+ Power Package
