Originally Posted by j2m
Here's the clip I heard, not sure if it's the "Sport"
That's a header-back system Royal Muffler (R1 Motorsport) made.....basically straight pipes from the header back; no cats, resonators, or mufflers. Here's a photo I found online of this setup before they welded on the mufflers. I'm guessing the OP's setup is one of their axle-back setups.