I'll add to this thread instead of starting another "exhaust topic". I just installed the Two Brothers Black Series M2 Carbon Fiber Slip-ons that I purchased from Fly-n-Cycle for $679 shipped (thanks fjrforum members). They are the lowest price I could find. Although, you will spend more money if you want the P1X power tips to quiet down the exhaust, $35 each and you'll need two. I haven't decided if I need them or not. These slip-ons are made in America, look and sound beautiful and were easy to install as long as you follow the directions. I do have two, well make that three complaints. 1) The cost of the power tips, I feel they should be included with the slip-ons similar to Leo Vince, Yoshimura who have a screw in/out quiet plug. 2) The 10mm flange nuts included in the hardware kit had the wrong thread pitch so they wouldn't screw on the provided 10mm bolts. Fortunately, I have a well stocked hardware store nearby and picked up 2 fine thread 10mm flange nuts that screwed right on. 3) Just like everyone else on this forum, I think the connector pipe (slip tube) has a sloppy fit to the FJR's exhaust. Two Bros does include a tube of RVT gasket goop in their kit but I wrapped a piece of exhaust tape inside the tube and got a good tight fit. So far, so good. If the tape does burn out i'll try a new Yamaha exhaust gasket. Iv'e only been able to start the bike and check for leaks and hear the wonderful 4-cylinder music. It sounds awesome. Can hardly wait to take it out for a test ride tomorrow and make sure the fueling is good.