Product Overview:
Our v370 power package ups the ante considerably. It is designed for those who are willing to accept a slightly louder exhaust note for maximum output and performance. For a slightly quieter exhaust note, opt for our Signature Series Turbo-Back exhaust system.

Coupled with careful recalibration of the factory fuel, ignition advance, boost , open/closed loop switchover, rev limit, etc,. parameters, we’re able to achieve a massive and perfectly drivable dyno-proven 60-70 flywheel horsepower gain on an otherwise stock Subaru Impreza STi. Also, by carefully remapping throttle maps and dynamic boost control parameters, throttle response and low end torque improves substantially. More importantly, these gains are safe and have proven to be cable of withstanding the rigors of heavy-duty competition use-- something few others can honestly claim.

◄ PRIOR STAGE

As with all of our ECU Reflash-based power packages, you will need to mail (or bring) your ECU to our Danville, CA facilities for the re-flashing of its ROM file. For removal and reinstallation directions, click here. If you chose to mail it to us, we can usually mail it back to you the same day we receive it, limiting your downtime to a matter of 2-3 days. If you bring it to us, you can even leave the ECU in your car since we can re-flash it through your OBD-II diagnostic port. This takes a matter of minutes and requires virtually no downtime of your car. Please specify 91, 93 or 94 octane applications.