Notes on the sound clips:

Cold Start.mp3:
Taken in a closed garage; car sat overnight. Not revved past 3k RPM. Audio taken from a shelf about 3 feet away from exhaust.

Acceleration.mp3:
Traffic launch with about 3/4 throttle through the gears, to engine braking. Windows up, audio taken from passenger seat.

Flyby.mp3:
WOT through 5th, granny shift to roll-on WOT in 6th, pass recorder @ ~4500-5000 RPM. Audio taken outside car (obviously).

Open Downpipe.mp3:
Some light revving with no exhaust whatsoever. Taken from underneath the car, within 2 feet of the open exhaust.