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The BMC Oval Trumpet Airbox kit for the 2007 Subaru Impreza III 2.5 WRX STI is a vehicle-specific intake assembly supplied as a complete oval trumpet-style airbox. It replaces the factory airbox with a model-matched kit sized for that Subaru application, serving as the engine's air intake housing and intended to fit the Impreza WRX STI configuration without requiring broad fabrication.
BMC 2007 Subaru Impreza III 2.5 WRX STI Oval Trumpet Airbox Kit
