For each pipe, we recorded mp3 clips for the sound testing and dyno testing portions. In the sound test, the bike was started, run at idle for a few seconds while sound was recorded, run at 6000rpm in neutral for several seconds, and then run at 60mph in fourth gear. These clips run approximately one minute in length, and about 600kB in size. The dyno run clips are approximately 30 seconds in length and 300kB in size, and cover one full dyno pull.Read the full test in the October 2004 issue of Sport Rider. Akrapovic: Sound test; Dyno run Arata: Sound test; Dyno run Arrow: Sound test; Dyno run Art: Sound test; Dyno run Blueflame with plug and baffle: Sound test; Dyno run Blueflame with plug only: Sound test; Dyno run Blueflame: Sound test; Dyno run Bos with plug: Sound test; Dyno run Bos: Sound test; Dyno run CHM: Sound test; Dyno run D&D: Sound test; Dyno run Devil: Sound test; Dyno run FMF: Sound test; Dyno run G-Force: Sound test; Dyno run GYT-R: Sound test; Dyno run Harris: Sound test; Dyno run Hindle: Sound test; Dyno run HMF: Sound test; Dyno run Hotbodies: Sound test; Dyno run Indigo: Sound test; Dyno run Ixil: Sound test; Dyno run Jardine: Sound test; Dyno run Laser with plug: Sound test; Dyno run Laser: Sound test; Dyno run Leo Vince: Sound test; Dyno run M4: Sound test; Dyno run Micron: Sound test; Dyno run Nikko: Sound test; Dyno run Remus: Sound test; Dyno run Scorpion: Sound test; Dyno run Stock: Sound test; Dyno run Ti-Force: Sound test; Dyno run Two Brothers: Sound test; Dyno run Wolf: Sound test; Dyno run Yoshimura: Sound test; Dyno run