Mine is the L2 comp, they make a standard one as well that is much quieter (this one is loud! sounds like a v8 taking off and it thunders) I havent ran muzzys or Dasa so I honestly cannot tell you how theirs is , but the Yosh was a great pipe (and I am actually sponsored by yosh too but only use their hard parts - roof,deflector,roostguards) , Speedwerx is much lighter but louder, the Yosh had a good sound and was a beautiful pipe with the carbon fiber, the only thing I found between the two was customer service with speedwerx was easier, call up get your answers or your replacement parts and I had them the next day and they also have the fuel map , fuel controller, and will build everything to work together (clutching with the pipe fuel map etc) so that youre not mix matching components. With the pcV and the speedwerx L2 setup you saw around 10 hp change on the dyno from the yosh slip on (the slip on wasnt intended for the X but rather a std model).Just noticed in your pictures you have a Speedwerx exhaust? Never even knew they made exhausts? How are they, knowing you are sponsored by them, but compared to say Muzzy's, or DASA or Yosh?