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The COBB Fuel Regulator Kit for 2015–2021 Subaru STI, including the 2018 Type RA, provides fuel-pressure control for vehicles upgraded from Stage 1 to NexGen Stage 2 and for Flex Fuel Redline CF Power Package configurations. It supports the upgrade path noted in the product description, helping tune fuel delivery for modified STI setups while matching COBB’s NexGen power-package workflow.
Cobb 15-21 Subaru STI / 2018 Type RA Stage 1 to NexGen Stg 2 + Flex Fuel Redline CF Power Pkg Upgd.
