TYPE OF STUTTER/STUMBLE
Steady throttle/Increasing throttle/Both:
MODS
Intake: None
Exhaust: Catted nvidia DP, Q300 CB
Fuel: 91/93
Turbo: Stock Vf40
Engine Management: Cobb AP V3
Tuner and revision of tune(if you don't mind): Rev2 of torqued performance tune
MAINTENANCE
Sensors changed: none currently
Plugs changed: 20 miles ago
Coil Packs changed: 20 miles ago
OTHER SYMPTOMS
Check Engine Light: None
Etc: -12 feedback knock around 2300-2500 rpm. Car is pulling timing due to "knock" short block compression and leakdown are fine. No rod bearing material in oil filter.
RESULTS
What has and hasn't worked for you: Tried changing from OTS tune to E tune and changing spark plugs and coil packs.
If something worked, how long has it been working for: Nothing currently.