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The COBB Fuel Regulator Kit for 2008–2021 Subaru STI, including the 2018 Type RA, is specified for builds moving from Stage 1+ to NexGen Stage 2 and for Flex Fuel Power Package upgrades. It is intended to be used as part of COBB’s power-package upgrade sequence, providing the fuel-pressure management step needed when moving between those NexGen and Flex Fuel configurations.
Cobb 08-21 Subaru STI / 2018 Type RA Stage 1+ to NexGen Stg 2 + Flex Fuel Power Package Upgrade
