Back to back SubaruWRX. This 2015 came in for a road tune on a 50/50 mix of e85 and 91 utilizing EcuTek RaceRom. PREVIOUSLY ecutek protuned elsewhere, it was tuned using full e85, which is something not possible without risking damage in the long term. Initial logging confirmed that the high pressure pump was dropping off. With the 50/50 mix we not only made things SAFER, but also picked up a max of 60whp in the powerband. We also added some backfire and pops n bangs by special request in addition to 3 way maps, flat foot shifting, boost off the line, and launch control.