Ok I just want this to be confirmed. The magan flow website confirms that they got 7.6hp and 10.6tq to the wheels. Ok I 've seen other threads that claim you will not get more then 4-5 hp from your cat-back. Is this legit or they just trying to get b15 owners to buy the cat-back. Since they know we are trying to get hp out of the mods. I'm planning on getting the Greddy and looking at the hp that I've heard is only like 4-5 from it. Then the magna would easily double it. But we all no that the Geddy is the best sound for the buck and I'm looking at the sound and hp. For those who have the magna flow confirm this. Is it really 7-8 hp and 10.6tq to the wheels or is this over rated. Also has anyone dynoed the magna flow cat-back.