Is the "power core" you're referring to a part of the Leo I assume? I don't have a quiet core in my LRD and it's actually quieter with the Benz on it than the factory exhaust is with the Benz on it. I'm assuming it's b/c the LRD is a higher decibel and maybe the benz is quieting the higher decibel on the LRD better than it quietens the lower decibel on the factory. Who knows.
