I was running them till about 2 weeks ago. With an off road h and long tubes. Sounded great. Not really really loud but they are loud enough. They sound great though. No drone at all. Loved them. I actually still have them but I wanted to try the Dynomax bullets for a while.
I ran 2 1/2" Aerochambers for six years. They were a nice sounding muffler with my various exhaust combinations (1 5/8" shorties, 1 5/8" longtubes, 1 3/4" longtubes).
I switched to 3" Dynomax Ultraflos and a 3" X a month ago. The Ultraflos are a little bassier sounding.