Anyone run Spintech Pro Street 9000 or 6000 that can tell me more about them and maybe a video? I wanna know how loud i can expect them to be, I have a magnaflow right now and I'm looking for something opposite of that sound, something with more muscle and throaty. I will be putting on Gibson headers at the same time i install the muffler. Any other suggestions on mufflers? I'm not a fan of Flowmaster