Cobb NexGen Stage 2 to NexGen Stg 2 + Flex Fuel Power Package Upgrade - Subaru STi 2008-2021This package is intended to be added to our 50 state legal NexGen Stage 2 Power Package. It includes both our NexGen Ethanol Content Sensor Kit and Fuel Pressure Sensor Kit, required for use with the supporting NexGen Stage 2+FlexFuel Off The Shelf Maps. WHY? This combination of our NexGen Ethanol Content Sensor and Fuel Pressure Sensor Kits allows users to take full advantage of their NexGen Stage 2 Power Package by adding the ability to take