Another thing I noticed is after the exhaust comes in, slams into the center-out pipe and squeezes around it, then the exhaust has to find its way into a straight cut internal pipe. And that flow director does not do anything. The exhaust just went above and below the center-out pipe and the flow director is not wide enough to catch the exhaust so wam into the side of the case and then into a smaller straight cut pipe. No wonder the car runs so much better now.