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The HKS drop‑in Super Hybrid filter for 2008–2011 Subaru WRX and STI models is a replacement air element developed for those specific applications. As a Super Hybrid version, it’s intended to serve as a direct replacement filter element engineered by HKS to fit the factory intake location on the listed WRX/STI years, providing consistent filtration for the vehicle’s intake system.
HKS 08-11 Subaru WRX / STI Drop-In Super Hybrid Filter
