no cat, no resonator, just 3" test pipe from japan miko give me, has some sound deadening inside, not just a str8 test pipe
3" piping into a big circular Magnaflow muffler. I believe its 7" or 8" diameter. I now have CEL from no cat.
It sounds mean, sounds way better than my cousins 3" wide canister muffler det. No raspiness what so ever.