Went for a little 500+ km ride yesterday. A buddy of mine hosts a fall colours ride every year and I was able to make it on this year's ride. Just before heading out I decided I would remove the dB killers (see below). Took all of 10 minutes to remove including getting the dremel out to grind off the tiny bead of weld holding the set screw. Wow, what a difference! Very deep tone - I love it!