gibson dual extreme catback (gibson #9704) i love mine on my 02 sohc. great sound, doesnt resonate in the cab too much, deep and mellow but barks when you hit it. it feels like a have a little more power pulling up hills but the real plus so far has been gas milage, ive went from 16.8 in mixed driving to 18.3 mixed while hitting it alot more often to hear it haha