That J pipe - is that welded into your exhaust aft of the muffler? And is it a closed end pipe? Couldn't tell from the photo bur it looks like it is. And you have one for each exhaust line? I'm impressed by the engineering but I'm going with a quieter muffler rather than that. I'm no acoustical engineer and it's just hard to believe that drone is that hard to solve. Back in my younger days, I admit a long time ago, we bought whatever performance muffler was available and drone was never mentioned. Thanks for all the help guys.