Subaru WRX STi Tuning
Subaru WRX STi Tuning 12/10/19

Great Gains

Tim @ BrenTuning mystery small turbo 2004 STI original motor and transmission with 165k making 415whp on pump. As you’ve heard us say before these are the golden year EJ25s hopefully will be reborn with the new upgraded “STi RA” motors now starting to be available.


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Competition use only parts are clearly labeled as competition use only in the product listing page and may only be used according to the guidelines posted on our Emissions Notice to Customers in California page