As far as the ISO’s go…. I could take em or leave em as far as function.. for looks they do dress up the bike.
For the de-baffle It depends on the tools you have on how long it takes. I would suggest going in stages though as you go. Start with maybe 4 holes in the first plate and run it around town to see if you like…then work your way up. The more holes the louder and deeper it gets. I eventually took all mine out. Which a by product some don’t like is the “backfire” popping on deceleration. Me I like it, but to get rid of it is fairly easy to.