Sometimes I'm amazed at my luck, but after installing a Fat Cat last week purchased through AMS, I find it a little loud at cruising speeds. I figured if it was too loud, I could just install the quiet baffle. So today I called AMS to see if the quiet bafflle was available yet, and the info I got was that you can't change the baffle cause it's welded in. You have to change the whole muffler ($395) whereas if you order it that way, it's only a $40 upcharge. The bolt you see that looks like it would hold the baffle in is just there to hold it while the welding is done. It's my fault for not asking more questions, but I just wanted to post this for anyone buying a FC. To further my bad luck , the shop (indy that's RT certified ) that did my dyno tune totally fubared it up. Bike runs like chit, idles at 850, and my mileage went from an average of 38 to 30. They said to bring it back, and I am, but if they screwed it up that much to start, I not real confident they can improve it much.