I just had my car srt6 dyno by eurocharged/ Jerry 354 rwhp/ 351 torgue no muffler replaced with y pipe and installed a header silencer in 1 exhaust tip, no drone at any speed, at wot sounds great. Normal driving u would not know muffler is gone!!!! When on dyno it got everyone"s attention at wot, it was loud but in a good way. Sounds very nice when you get on it. I do have a video/audio of car on dyno just got it edited will try and post tomorrow.Danny