Completely stock performance-wise.
To reiterate in case you misunderstood, I definitely noticed a difference in performance and throttle response when I first installed the intake. I haven't noticed anything else since that point except for sound improvement as it has been adapting.
Kinda makes me wonder what I'm gonna need to do to properly "adapt" the stock intake once I put it back in to dyno tomorrow.
2008 E92 MT | VTT Stage 2+ 20T | VTT Inlets | JB4 MHD E85 | Fuel-It Stage 3 LPFP w/FPR and Return | BMS PI | AR DP | AE Quad Exhaust | Helix FMIC | ER CP | Tial BOV | DCI | AR OCC | Spec Stage 3+ | SMFW