I got a freind with the old set up on his 65 mustang and it was so loud it rattled the dishes in the china cabnit when he started it in the basment garage. Needless to say his wife made him change some things since it cracked some off the china. Any ways he turned the dumps to the side and it did keep it from being louder cause the sound wasn't bouncing off the floor. You wouldnt want to sell your old set up would ya? I've been wanting to go louder and annoy my wife.haha