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

Great Gains

How to gain +35whp/35wtq (or much more with different turbo!) in your WRX STI at the pump same boost levels with @cobbtuning 🌽 flex fuel kit. Flexible fueling from 91-93 octane to E85 and every blend or mix in between. The car will automatically adjust to the fuel of your choice nice setup.


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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