Subaru EJ WRX/STI Single Fuel E-Tune

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Once Tune purchase is complete, you will get an email with instructions and Base Map within 24 - 48 hours. Due to high demand and being super busy, please allow 72 hours before emailing, texting, or calling me after you send me your Datalog/Map. I will get back to you in order from oldest-newest emails. 

Expedite Fee

You will be prioritized and pushed to the front of the line. Select or search for "Expedite Tuning" under Tuning Tab.

Tuning Refund Policy

Due to the digital nature of the Tune, there will not be refunds or warranty claims. By purchasing the Tune, you acknowledge all sales are FINAL and there will be NO REFUNDS once Base Map is Sent via Email provided.

Tuning Waiver

As the “Customer”, I hereby represent that I have read the Tuning policies and that I have full authority to authorize the testing and tuning of this vehicle and to enter into this Waiver/Release.

I am aware that the tuning procedure is intended to and will be to maximize power and performance at Wide-Open Throttle to simulate stress similar to that which the vehicle would experience during operation on the road/track; therefore, I understand that it is susceptible to the same risks as on the road/track which may cause wear and tear or complete damage to, but not limited to: Engine, Powertrain and/or Tire/Wheel Failure or Damage.

Tuning Legal Policy

You acknowledge that this product is intended for off-road use ONLY. The customer releases Gap City Performance from any liability of any nature for damage or other losses, which may be sustained as a result of the testing/tuning process.

Customer Reviews
5.0 Based on 7 Reviews
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Keanan s.
United States United States

Honest review

Love the over all costumer service. Blown a turbo and Jesus sat down with me all day looking at affordable setups. Making sure everything will fit properly and everything. Got a tune and could not be happier. Speed and burble tuned had a little hiccup with a boost cut and not 10 min later it was fixed.

United States United States


12/10 definitely recommend got my tune with gap city and my car has never ran better than it is now. Got that special type of #gapsauce

Christian C.

High Quality Customer Service!

Gap City has been awesome to deal with! Currently in the process of building my 2015 STI FBO E85 With a big turbo. jesus has helped me with my build list and given me great guidance to build my car on my own and properly! Always willing to answer questions and always makes sure you are buying the right and high quality parts for your build!

Cody J.

2016 STI

Great tuning, car has never ran better.

John M.

Awesome knowledge of tuning and Customer service is A++

Tuning is superior than any Protune I've ever had! Customer service is top notch!