SOUND CLIPS ADDED!!!!!
I'm still getting used to this high quality recorder...so might have you adjust your volume, but you can hear the flutter usually earlier on in the acceleration. Goes away as the exhaust gets louder. Does this help? I'm leaning towards possible exhuast leak.....
Also, isn't the SC whine pretty quiet for mods (NW CAI, C3 pulley, LET tune...etc.)?
Windows Up:
SRT-6 flutter (windows up) - SRT-6 noise when under load, windows up, "flutter", also SC whine seems very quiet for NW CAI and C3 pulley.
Windows Down:
SRT-6 flutter (windows down) - windows down, under 40 mph in 2nd gear