HJ...Have you added internal stingers to any of your old nitro pipes? It's pretty easy to do...piece of K&S brass tube fit inside the pipes's stinger back to the fatest part of the pipe (or just short of it) with a couple of slits were it meets the beginning of the pipe stinger for drainage. Hold in place with JB Weld. Takes about 15 minutes and can be removed with a little heat and pushing it out. Really knocks down the DB level and really does not hurt perfomance after the pipe length is reset. Looking forward to meeting you. RC