Some sources, such as the Protege FAQ and some posts on this forum, indicate that MP3s, or possibly some MP3s, came with a 19mm rear sway bar. Not the same as the 20mm MSP bar. Can any of you MP3 guys confirm this? Thanks for the help.
Ok, I also PMed Jason at onlinemazdaparts.com. He called MazdaUSA and they said there was no 19mm bar. This, combined with the info on the Racing Beat website, I think conclusively shows that the 19mm RB bar is indeed just a rumor.