Wrapping up @weasels.ws clean 2018 WRX STi. Added @Cobb tuning flex fuel kit and supporting fuel system: lines, regulator, pump and ID1700s, and IAT relocate for full SD. While barely breathing on boost she made 454whp on 93 and 525 repeatably on E70 due to the efficient head work. Consistency and heat management is key when mapping a track lapped car and with careful testing we were able to build in a big margin of safety utilizing the CCF style Cobb rom.