Installed them today, first thing is that there's virtually no difference in sound while running, the H pipe is about as quiet as the collector box. Second is I notice no difference in power, feels identical but haven't been at top highway speeds yet. Of course the bike lost what feels like 20lbs, and my collector box was pretty rusty/minor holes etc - I was able to finally see the backside and bottom of my transmission, and clean the area. Much sleeker look. One thing I noticed is that all the stock BMW gaskets I bought really didn't fit from the years of cooked on old gaskets. I had to cut the 2 rears down to slip them in the cans. The fronts (soft gaskets) didn't fit at all, so I used a bit of red gasket sealant. So far no backfires. I'm sold on Moto-bins, they're quick.