I thought it was just my imagination after going to Stage 2 with a Torque Performance map that my car was not running as well when I first installed...
You did indeed hit the O2 sensor with some of the Seafoam to get a CEL. If you had a Cobb AccessPort or reader you could have seen exactly the error...
Purchased a 2008 WRX seat as a donor for my conversion from factory seat to Sparco. Removed all the electronics and disassembled the seat completely...