M8, it does. Believe me. If something serious goes wrong about your car, coreans can request online video of your car. If something is wrong with your engine and gearbox, the first place they will check is ecu. Thats why we stoped opening up ecu's. I talked to several dealers and it's 100% warranty loss.
Also I tested back to back stingers with flashed ecu / lap3pro (i have their original software for lap top, so I can tune those boxes) and with 2.0 we get the same numbers. But with lap3 I do 3 maps for client. Stock (95 octane and 2 maps for 100 octane). Because the limitation is not a tune, but the turbo.
The only difference with lap / ecu flash is the throttle tuning. Yes, with lap we are not touching it, with ecu flash we make it sharper. But on the other hand, you can floor the throttle to get same result.