IIRC it's 1 3/4" off the primaries. I can somewhat quiet the car for daily driving but most of the time I leave it open it's just too much fun. It's the PFADT headers (google them they're one of the best available for the GM engines) I have plenty of videos playing around with it. Here's a cold start and some granny shifting action...Evo X chilling next to it on the left. The cars are polar opposites.