This may be useful to some or not but.. When I bought my bike it came with a spare set of baffles. I could not remember if the seller said the quiet baffles were on the bike or in the box. On my recent trip out of town, a buddy said he would pull my baffles and "modify" them because I wanted it louder. When we pulled the baffles, (which took about one hour for the top pipe and ten minutes for the bottom) we removed the fiberglass wrap. The lower baffle had one hole drilled into the end cap, about 1/4" diameter. We drilled one more hole into that baffle then put one hole in the top. After reinstalling, there was a slight noticeable difference in loudness and a deeper tone. We removed them and added one more hole in each. Very happy with the sound and tone. On my return ride from Colorado, I noticed much more quickness while rolling on the throttle at interstate speed. It seemed like I had lost a litle torque but that may have been from running in the Denver altitude. I will know more when I get some riding in around home. I still have the other set of baffles in my garage. They are basically honeycombed, rifled, hollow tubes. No ends at all. What are these for and is anybody running these in their bigshots. Curiosity will have me putting these in to see what they have to offer.