COBB STI Redline Carbon Fiber Intake Replacement Filter ONLY | 2015–2020 STI (Manufacturer SKU 7V2101).
Replacement filter ONLY for an existing COBB Redline Carbon Fiber Intake on 2015–2020 Subaru WRX STI; not for the factory airbox, COBB standard SF Intake, or an unrelated intake. Although the COBB Confirmed Applications table includes 2021 STI, its replacement-filter description names the 2015–2020 Redline system; 2021 is held pending confirmation of the matching intake SKU. Verify the installed COBB intake before ordering. COBB classifies this as not an emissions-related part.
Manufacturer references: COBB official kit/component page
