I had a new exhaust system put in mine a couple years ago with 2 ¼” pipe leading into Flowtech Terminator mufflers with turn downs just ahead of the axle. I had been running the same brand and model mufflers for over 10 years, but when all the pipes wore out I replaced them. They are rather mellow and never did generate excessive noise in the cab (and no droning). On the new system I decided to have a crossover pipe installed, and it literally cut the sound level in half. At first I was disappointed it was so quiet, but from the outside it sounds like a 60’s Corvette (at least to my untrained ear). Under full throttle it is still very impressive.
Here are some photos showing the layout:
[IMG]http://img412.imageshack.us/img412/2383/001tqu.jpg[/IMG][IMG]http://img834.imageshack.us/img834/6696/002ess.jpg[/IMG][IMG]http://img831.imageshack.us/img831/6820/003xz.jpg[/IMG]I like the turn downs because they don’t interfere with anything, and the entire system can be easily removed if needed. They are also great for blowing debris off the driveway, but not so much fun when driving around on dirt.