I didn't want to go the aftermarket route because I felt the more affordable cans looked like something that was slapped on, an afterthought, (unless I spent $900+ on a high end can), so I went to Lowes and bought 2 long drill extensions and a 1 1/8" hole saw and drilled the snot out of it through the back end. Believe it or not, it gave me just enough extra growl at cruise to feel good about having a 1400 cc engine, and when I get on it, it actually sounds pretty good! Not loud, but present, if you know what I mean? Instead of the previous stock "wooosh" now I get a nice "GrrrrrRRRRR" Only downside is a few blips and pops on decel. It "feels" like there's more power, but that's probably more the Shoudaben tune. Funny, before drilling, there was a spot in the 1200-1500 rpm range that would fluctuate and surge. After drilling, it's barely noticable...go figure...
So, in the end, I figured, not hard, inexpensive, and if it didn't work, I could either buy a nice aftermarket or pick up one of the OEM's everyone has taken off...how could I lose!
BTW - Love the "Engineering vs YouTube vids" comment, MOB. Spot on. For that matter, I've been turning wrenches for over 40 years, and 25-30 year olds still think they know more 'cause they "Googled it"...hillarious...