Just got done with the 5" TBE to dual 4" from BADP. I can't say that I am 100% satisfied with the whole experience, but I am definately enjoying the kit. Finally got to get even with one of the motorcycle guys that always pull right up on my back bumper. Dual exit pipes with the MP-8 and edge turned all the way up definately don't agree with an open helmet. I let out enough black smoke that I couldn't see him through it. Exhuast temps did drop, but haven't gotten an exact drop yet. I love the sound. With duals you can only get it with a muffler, which turned out to be perfect for me. Enough sound when you get on it, but no drone sound anywhere through the powerband. Mileage has also begun to climb fast as long as I keep my foot out of it as well. I had to customize one hanger on the extension pipe because it was welded about 12" short of the hanger that it was supposed to hang from. Definately alot of room for adjustment in the pipes which helps getting them adjusted just right. I was missing some clamps which I will contact them about tomorrow. They listed it as a 5" dual kit with 6" tips, which I thought was 5" all the way back, but they said the only way it comes in duals is 4" with 5" tips. Like I said overall I'm pleased with the kit, but if they get their website worded a little clearer and fix the minor things, it would be a perfect system.