Cool info. I guess it all depends on what you want. I think the worst visual part about the 05 Mustang is the view of the mufflers. That is the main reason why I think the SLP Loud Mouth system would a nice way to remove that eye sore. I have heard the Loud Mouth system before and I didn't think it was all that much louder then the others but I guess it is. I would like to see a test on the 05 Mustang when all the vendors have kits available. Seems like both the SLP and Magnaflow cat backs make decent power gains on the Mach 1, one is better on HP (Magnaflow +4) while the other was better on TQ (SLP + 6.7). It would have been nice to see a dyno chart for these test since peak numbers don't always tell the whole story. Anyway thanks for the info.