This exhaust is.....INSANE!!! there is no raspyness at all or the "Lawn mower" sound at all. It is very deep and smooth at low rpms and gets more quiet in the 3-4.5krpm and explodes past that. Definetly improved power, but the sound itself is worth the money. The tips are very, very nice looking and still give it a bit stock look to it, however with the two side by side theres a definet difference.
The dyno it was tested on is extremly accurate and usually reads low. Since i have the CVT it would **** before the redline. Given that first run was at 230hp, next run was at 224hp (Dyno Dynamics Dynamometer). In comparison this garage specializes in Subarus and Mitsubishis. A stock WRX on their Dyno put out 160Hp, They told me it was getting more power to the wheels than a stock STI. I find this very hard to believe but they are experts. I believe on a regular Dyno (jet) it would be 240hp+ to the wheels.
http://youtube.com/watch?v=6LiRIo0G0UU
In real life its way more deep and smooth, the vid makes it seem crackly which it isnt at all.... towards the end in the high rpms is realisticly what it sounds like. I tried to get a vid of the dyno but my camera ran outa batteries.
Enjoy