Just installed Vance / Hines Dresser Duals, CFR Mufflers, Power Commander V with Fuel Moto Map. Like some others I was concerned about loss of torque with the CFR 's. I spoke with Cary Faas who does not recommend cross over headers, x pipes or stepped headers with his mufflers. Then called Fuel Moto to discuss Power Commanders and maps for the above mentioned. Told Fuel Moto I was looking for over all performance not all torque and horsepower. They were super to talk and deal with. Long story short I decided to go for it. Took a couple 200 mile rides after I finished the install. Wow what an improvement, bike runs like a top. Little loud but man does it sound good. From the seat of my pants I sure don't notice loss of torque between 2 and 2400 rpms like I read about. Both rides were mostly in the hills with some Hwy, no freeway, some 95 mph spurts here and there. First fill up 41 mpg. If your curious about the sound Iron Aces's web site has a great sound clip of CFR's with Dressers Duals. CFR's really fill the hole in the bags and fender on my 2012 RG. would I do it again Hell ya