The saga continues... I was able to get to the dyno again and do some runs with the Akra x-pipe. Same gas (Shell 91), same-ish temps/humidity... Looks like normal gains for hp and torque that come with the Akra. Next stop, OEM software upgrade and/or tune and another run.
Run file 3: Best run of first dyno last spring (Akra rear, no other mods)
Run file 8: Best run from follow-up confirmatory run
Run file 18: Best run from last weekend (with full Akra Evo)