Part number 64900186a, says fitment is for 2009 and up.. Does anyone know if they would fit back to say 2000 on the touring models?

 

Won't fit. The differences between the two frames won't allow it.

 

Has nothing to do with frame differences, I've installed mufflers from an 07 onto a 10 with no issues. Harley is strange with its fitment's, some you have to take with a grain of salt. Look at some of the other exhaust manufacturers and you'll find mufflers with fitment from 1995 - 2016.

 

I was thinking OP was referring to the exhaust system and not just the resonators. When I re-read his post I saw what he did state. My bad.

 

I had these on my 03 Ultra. They fit just fine and looked great. They sounded like total crap on a stock 88" motor. Ask your dealer if they have a demo set you can try before you drop 500 bucks on something that sounds like a volkswagon running under water.