I did the pair valve removal last night not as hard to do as i thought. Tony has some good instructions on how to do it on the forum. Took me just over an hour i think.
After starting it up i didn't really notice a big change in the sound but on the first shot ride i took last night i could tell it sounds a lot smoother while shifting through the gears.. I have yet to take it out on the hwy going over 55mph to see how the high rev decel sounds. but so far so good.