I dont have open headers as I have always run the 63 with the exh on it but it is kinda loud with 3" pipes and Ultra-Flow mufflers. Neighbors are cool but the couple next door had a baby last year so when I come home on wekend nites after cruising somtimes at 11 to 12 oclock I shut it off as soon as I roll in the driveway. Then I open the garage door and fire it up and pull right in and shut it off. Just trying have respect for thier baby but I have not had any problems. Ron