I have an 05 V8 and running without mufflers for about a year now and simply love it. I get nothing but compliments and have constantly had people in mustangs, camaros, and chargers stop me to ask what I did to my LS to make it sound better than theirs; even had police stop me once to compliment me..LOL! I still have the cats and resonator in place as well as the stock H-Pipe; running 18inch by 4inch wide tips to fill in the cutouts in the rear bumper. I don't plan on putting mufflers on anytime in the near future and will eventually do the air intake. When I really want to show off, I kick it into SST and really make it growl! But if riding around police, I leave it in auto to mellow it down. Seemst to be much louder and throatier when the outside temps are around 50 degrees. Still have to do the reverse SST mod..... Also here in Pittsburgh, Pa. we have to do state inspection and emissions but I had absolutely no problems with inspection or emissions so far.